accept assignment meaning

As a Medical Biller, the better you understand the medical insurance payment process, the better you can care for your patients. Your understanding of what a patient will owe and what will be covered can help them navigate the confusing world of medical insurance.

One term that can be very confusing for patients (and for doctors as well) is ‘Accepting Assignment’.

Essentially, ‘assignment’ means that a doctor, (also known as provider or supplier) agrees (or is required by law) to accept a Medicare-approved amount as full payment for covered services.

This amount may be lower or higher than an individual’s insurance amount, but will be on par with Medicare fees for the services.

If a doctor participates with an insurance carrier, they have a contract and agree that the provider will accept the allowed amount, then the provider would check “yes”.  

If they do not participate and do not wish to accept what the insurance carrier allows, they would check “no”.   It is important to note that a provider who does not participate can still opt to accept assignment on just a particular claim by checking the “yes” box just for those services.

In other words by saying your office will accept assignment, you are agreeing to the payment amount being covered by the insurer, or medicare, and the patient has no responsibility.

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Medicare Assignment: Everything You Need to Know

Medicare assignment.

• Providers Accepting Assignment
• Providers Who Do Not
• Billing Options
• Assignment of Benefits
• How to Choose

Frequently Asked Questions

Medicare assignment is an agreement between Medicare and medical providers (doctors, hospitals, medical equipment suppliers, etc.) in which the provider agrees to accept Medicare’s fee schedule as payment in full when Medicare patients are treated.

This article will explain how Medicare assignment works, and what you need to know in order to ensure that you won’t receive unexpected bills.

fizkes / Getty Images

There are 35 million Americans who have Original Medicare. Medicare is a federal program and most medical providers throughout the country accept assignment with Medicare. As a result, these enrollees have a lot more options for medical providers than most of the rest of the population.

They can see any provider who accepts assignment, anywhere in the country. They can be assured that they will only have to pay their expected Medicare cost-sharing (deductible and coinsurance, some or all of which may be paid by a Medigap plan , Medicaid, or supplemental coverage provided by an employer or former employer).

It’s important to note here that the rules are different for the 29 million Americans who have Medicare Advantage plans. These beneficiaries cannot simply use any medical provider who accepts Medicare assignment.

Instead, each Medicare Advantage plan has its own network of providers —much like the health insurance plans that many Americans are accustomed to obtaining from employers or purchasing in the exchange/marketplace .

A provider who accepts assignment with Medicare may or may not be in-network with some or all of the Medicare Advantage plans that offer coverage in a given area. Some Medicare Advantage plans— health maintenance organizations (HMOs) , in particular—will only cover an enrollee’s claims if they use providers who are in the plan's network.

Other Medicare Advantage plans— preferred provider organizations (PPOs) , in particular—will cover out-of-network care but the enrollee will pay more than they would have paid had they seen an in-network provider.

Original Medicare

The bottom line is that Medicare assignment only determines provider accessibility and costs for people who have Original Medicare. People with Medicare Advantage need to understand their own plan’s provider network and coverage rules.

When discussing Medicare assignment and access to providers in this article, keep in mind that it is referring to people who have Original Medicare.

How to Make Sure Your Provider Accepts Assignment

Most doctors, hospitals, and other medical providers in the United States do accept Medicare assignment.

Provider Participation Stats

According to the Centers for Medicare and Medicaid Services, 98% of providers participate in Medicare, which means they accept assignment.

You can ask the provider directly about their participation with Medicare. But Medicare also has a tool that you can use to find participating doctors, hospitals, home health care services, and other providers.

There’s a filter on that tool labeled “Medicare-approved payment.” If you turn on that filter, you will only see providers who accept Medicare assignment. Under each provider’s information, it will say “Charges the Medicare-approved amount (so you pay less out-of-pocket).”

What If Your Provider Doesn’t Accept Assignment?

If your medical provider or equipment supplier doesn’t accept assignment, it means they haven’t agreed to accept Medicare’s approved amounts as payment in full for all of the services.

These providers can still choose to accept assignment on a case-by-case basis. But because they haven’t agreed to accept Medicare assignment for all services, they are considered nonparticipating providers.

Note that "nonparticipating" does not mean that a provider has opted out of Medicare altogether. Medicare will still pay claims for services received from a nonparticipating provider (i.e., one who does not accept Medicare assignment), whereas Medicare does not cover any of the cost of services obtained from a provider who has officially opted out of Medicare.

If a Medicare beneficiary uses a provider who has opted out of Medicare, that person will pay the provider directly and Medicare will not be involved in any way.

Physicians Who Have Opted Out

Only about 1% of all non-pediatric physicians have opted out of Medicare.

For providers who have not opted out of Medicare but who also don’t accept assignment, Medicare will still pay nearly as much as it would have paid if you had used a provider who accepts assignment. Here’s how it works:

• Medicare will pay the provider 95% of the amount they would pay if the provider accepted assignment.
• The provider can charge the person receiving care more than the Medicare-approved amount, but only up to 15% more (some states limit this further). This extra amount, which the patient has to pay out-of-pocket, is known as the limiting charge . But the 15% cap does not apply to medical equipment suppliers; if they do not accept assignment with Medicare, there is no limit on how much they can charge the person receiving care. This is why it’s particularly important to make sure that the supplier accepts Medicare assignment if you need medical equipment.
• The nonparticipating provider may require the person receiving care to pay the entire bill up front and seek reimbursement from Medicare (using Form CMS 1490-S ). Alternatively, they may submit a claim to Medicare on behalf of the person receiving care (using Form CMS-1500 ).
• A nonparticipating provider can choose to accept assignment on a case-by-case basis. They can indicate this on Form CMS-1500 in box 27. The vast majority of nonparticipating providers who bill Medicare choose to accept assignment for the claim being billed.
• Nonparticipating providers do not have to bill your Medigap plan on your behalf.

Billing Options for Providers Who Accept Medicare

When a medical provider accepts assignment with Medicare, part of the agreement is that they will submit bills to Medicare on behalf of the person receiving care. So if you only see providers who accept assignment, you will never need to submit your own bills to Medicare for reimbursement.

If you have a Medigap plan that supplements your Original Medicare coverage, you should present the Medigap coverage information to the provider at the time of service. Medicare will forward the claim information to your Medigap insurer, reducing administrative work on your part.

Depending on the Medigap plan you have, the services that you receive, and the amount you’ve already spent in out-of-pocket costs, the Medigap plan may pay some or all of the out-of-pocket costs that you would otherwise have after Medicare pays its share.

(Note that if you have a type of Medigap plan called Medicare SELECT, you will have to stay within the plan’s network of providers in order to receive benefits. But this is not the case with other Medigap plans.)

After the claim is processed, you’ll be able to see details in your MyMedicare.gov account . Medicare will also send you a Medicare Summary Notice. This is Medicare’s version of an explanation of benefits (EOB) , which is sent out every three months.

If you have a Medigap plan, it should also send you an EOB or something similar, explaining the claim and whether the policy paid any part of it.

What Is Medicare Assignment of Benefits?

For Medicare beneficiaries, assignment of benefits means that the person receiving care agrees to allow a nonparticipating provider to bill Medicare directly (as opposed to having the person receiving care pay the bill up front and seek reimbursement from Medicare). Assignment of benefits is authorized by the person receiving care in Box 13 of Form CMS-1500 .

If the person receiving care refuses to assign benefits, Medicare can only reimburse the person receiving care instead of paying the nonparticipating provider directly.

Things to Consider Before Choosing a Provider

If you’re enrolled in Original Medicare, you have a wide range of options in terms of the providers you can use—far more than most other Americans. In most cases, your preferred doctor and other medical providers will accept assignment with Medicare, keeping your out-of-pocket costs lower than they would otherwise be, and reducing administrative hassle.

There may be circumstances, however, when the best option is a nonparticipating provider or even a provider who has opted out of Medicare altogether. If you choose one of these options, be sure you discuss the details with the provider before proceeding with the treatment.

You’ll want to understand how much is going to be billed and whether the provider will bill Medicare on your behalf if you agree to assign benefits (note that this is not possible if the provider has opted out of Medicare).

If you have supplemental coverage, you’ll also want to check with that plan to see whether it will still pick up some of the cost and, if so, how much you should expect to pay out of your own pocket.

A medical provider who accepts Medicare assignment is considered a participating provider. These providers have agreed to accept Medicare’s fee schedule as payment in full for services they provide to Medicare beneficiaries. Most doctors, hospitals, and other medical providers do accept Medicare assignment.

Nonparticipating providers are those who have not signed an agreement with Medicare to accept Medicare’s rates as payment in full. However, they can agree to accept assignment on a case-by-case basis, as long as they haven’t opted out of Medicare altogether. If they do not accept assignment, they can bill the patient up to 15% more than the Medicare-approved rate.

Providers who opt out of Medicare cannot bill Medicare and Medicare will not pay them or reimburse beneficiaries for their services. But there is no limit on how much they can bill for their services.

A Word From Verywell

It’s in your best interest to choose a provider who accepts Medicare assignment. This will keep your costs as low as possible, streamline the billing and claims process, and ensure that your Medigap plan picks up its share of the costs.

If you feel like you need help navigating the provider options or seeking care from a provider who doesn’t accept assignment, the Medicare State Health Insurance Assistance Program (SHIP) in your state may be able to help.

A doctor who does not accept Medicare assignment has not agreed to accept Medicare’s fee schedule as payment in full for their services. These doctors are considered nonparticipating with Medicare and can bill Medicare beneficiaries up to 15% more than the Medicare-approved amount.

They also have the option to accept assignment (i.e., accept Medicare’s rate as payment in full) on a case-by-case basis.

There are certain circumstances in which a provider is required by law to accept assignment. This includes situations in which the person receiving care has both Medicare and Medicaid. And it also applies to certain medical services, including lab tests, ambulance services, and drugs that are covered under Medicare Part B (as opposed to Part D).

In 2021, 98% of American physicians had participation agreements with Medicare, leaving only about 2% who did not accept assignment (either as a nonparticipating provider, or a provider who had opted out of Medicare altogether).

Accepting assignment is something that the medical provider does, whereas assignment of benefits is something that the patient (the Medicare beneficiary) does. To accept assignment means that the medical provider has agreed to accept Medicare’s approved fee as payment in full for services they provide.

Assignment of benefits means that the person receiving care agrees to allow a medical provider to bill Medicare directly, as opposed to having the person receiving care pay the provider and then seek reimbursement from Medicare.

Centers for Medicare and Medicaid Services. Medicare monthly enrollment .

Centers for Medicare and Medicaid Services. Annual Medicare participation announcement .

Centers for Medicare and Medicaid Services. Lower costs with assignment .

Centers for Medicare and Medicaid Services. Find providers who have opted out of Medicare .

Kaiser Family Foundation. How many physicians have opted-out of the Medicare program ?

Center for Medicare Advocacy. Durable medical equipment, prosthetics, orthotics, and supplies (DMEPOS) updates .

Centers for Medicare and Medicaid Services. Check the status of a claim .

Centers for Medicare and Medicaid Services. Medicare claims processing manual. Chapter 26 - completing and processing form CMS-1500 data set .

Centers for Medicare and Medicaid Services. Ambulance fee schedule .

Centers for Medicare and Medicaid Services. Prescription drugs (outpatient) .

By Louise Norris Norris is a licensed health insurance agent, book author, and freelance writer. She graduated magna cum laude from Colorado State University.

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Find-A-Code Articles, Published 2014, August 1

What does accept assignment mean.

by   InstaCode Institute Aug 1st, 2014 - Reviewed/Updated Mar 5th

What does it mean to accept assignment on the CMS 1500 claim form - also called the HCFA 1500 claim form.? Should I accept assignment or not? What are the guidelines for accepting assignment in box 27 of the 1500 claim?

These commonly asked questions should have a simple answer, but the number of court cases indicates that it is not as clear cut as it should be. This issue is documented in the book “Problems in Health Care Law” by Robert Desle Miller. The definition appears to be in the hands of the courts. However, we do have some helpful guidelines for you.

One major area of confusion is the relationship between box 12, box 13 and box 27.  These are not interchangeable boxes and they are not necessarily related to each other.

According to the National Uniform Claim Committee (NUCC), the "Accept Assignment" box indicates that the provider agrees to accept assignment.  It simply says to enter an X in the correct box.  It does NOT define what accepting assignment might or might not mean.

It is important to understand that if you are a participating provider in any insurance plan or program, you must first follow the rules according to the contract that you sign. That contract supersedes any guidelines that are included here.

Medicare Instructions / Guidelines

PARTICIPATING providers MUST accept assignment according to the terms of their contract.  The contract itself states:

“Meaning of  Assignment  - For purposes of this agreement, accepting  assignment  of the Medicare Part B payment means requesting direct Part B payment from the Medicare program.  Under an  assignment , the approved charge, determined by the Medicare carrier, shall be the full charge for the service covered under Part B.  The participant shall not collect from the beneficiary or other person or organization for covered services more than the applicable deductible and coinsurance.”

By law, the providers or types of services listed below MUST also accept assignment:

• Clinical diagnostic laboratory services;
• Physician services to individuals dually entitled to Medicare and Medicaid;
• Services of physician assistants, nurse practitioners, clinical nurse specialists, nurse midwives, certified registered nurse anesthetists, clinical psychologists, and clinical social workers;
• Ambulatory surgical center services for covered ASC procedures;
• Home dialysis supplies and equipment paid under Method II;
• Ambulance services;
• Drugs and biologicals; and
• Simplified Billing Roster for influenza virus vaccine and pneumococcal vaccine.

NON-PARTICIPATING providers can choose whether to accept assignment or not, unless they or the service they are providing is on the list above.

The official Medicare instructions regarding Boxes 12 and 13 are:

“Item 12 – The patient's signature authorizes release of medical information necessary to process the claim. It  also authorizes payments of benefits  to the provider of service or supplier when the provider of service or supplier accepts assignment on the claim.” “Item 13 - The patient’s signature or the statement “signature on file” in this item  authorizes payment of medical benefits  to the physician or supplier. The patient or his/her authorized representative signs this item or the signature must be on file separately with the provider as an authorization. However, note that when payment under the Act can only be made on an assignment-related basis or when payment is for services furnished by a participating physician or supplier, a patient’s signature or a “signature on file” is not required in order for Medicare payment to be made directly to the physician or supplier.”

Regardless of the wording on these instructions stating that it authorizes payments to the physician, this is not enough to ensure that payment will come directly to you instead of the patient.To guarantee payment comes to you, you MUST accept assignment.

Under Medicare rules, PARTICIPATING providers are paid at 80% of the  physician fee schedule allowed amount  and NON-participating providers are paid at 80% of the allowed amount, which is 5% less than the full Allowed amount for participating providers. Only NON-participating providers may "balance bill" the patient for any amounts not paid by Medicare, however, they are subject to any state laws regarding balance billing.

TIP: If you select YES, you may or may not be subject to a lower fee schedule, but at least you know the payment is  supposed  to come to you.

NON-MEDICARE Instructions / Guidelines

PARTICIPATING providers MUST abide by the terms of their contract.  In most cases, this includes the requirement to accept assignment on submitted claims.

NON-PARTICIPATING providers have the choice to accept or not accept assignment.

YES means that payment should go directly to you instead of the patient.  Generally speaking, even if you have an assignment of benefits from the patient (see box 12 & 13), payment is ONLY guaranteed to go to you IF you accept assignment.

NO is appropriate for patients who have paid for their services in full so they may be reimbursed by their insurance.  It generally means payment will go to the patient.

What Does Accept Assignment Mean?. (2014, August 1). Find-A-Code Articles. Retrieved from https://www.findacode.com/articles/what-does-accept-assignment-mean-34840.html

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Does your provider accept Medicare as full payment?

You can get the lowest cost if your doctor or other health care provider accepts the Medicare-approved amount  as full payment for a covered service. This is called “accepting assignment.” If a provider accepts assignment, it’s for all Medicare-covered Part A and Part B services.

Using a provider that accepts assignment

Most doctors, providers, and suppliers accept assignment, but always check to make sure that yours do.

If your doctor, provider, or supplier accepts assignment:

• Your out-of-pocket costs may be less.
• They agree to charge you only the Medicare deductible and coinsurance amount, and usually wait for Medicare to pay its share before asking you to pay your share.
• They have to submit your claim directly to Medicare and can't charge you for submitting the claim.

How does assignment impact my drug coverage?

Using a provider that doesn't accept Medicare as full payment

Some providers who don’t accept assignment still choose to accept the Medicare-approved amount for services on a case-by-case basis. These providers are called "non-participating."

If your doctor, provider, or supplier doesn't accept assignment:

• You might have to pay the full amount at the time of service.
• They should submit a claim to Medicare for any Medicare-covered services they give you, and they can’t charge you for submitting a claim. If they refuse to submit a Medicare claim, you can submit your own claim to Medicare. Get the Medicare claim form .
• They can charge up to 15% over the Medicare-approved amount for a service, but no more than that. This is called "the limiting charge."  

Does the limiting charge apply to all Medicare-covered services?

Using a provider that "opts-out" of Medicare

• Doctors and other providers who don’t want to work with the Medicare program may "opt out" of Medicare.
• Medicare won’t pay for items or services you get from provider that opts out, except in emergencies.
• Providers opt out for a minimum of 2 years. Every 2 years, the provider can choose to keep their opt-out status, accept Medicare-approved amounts on a case-by-case basis ("non-participating"), or accept assignment.

Find providers that opted out of Medicare.

Private contracts with doctors or providers who opt out

• If you choose to get services from an opt-out doctor or provider you may need to pay upfront, or set up a payment plan with the provider through a private contract.
• Medicare won’t pay for any service you get from this doctor, even if it’s a Medicare-covered service.

What are the rules for private contracts?

You may want to contact your  State Health Insurance Assistance Program (SHIP) for help before signing a private contract with any doctor or other health care provider.

What do you want to do next?

• Next step: Get help with costs
• Take action: Find a provider
• Get details: How to get Medicare services

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What is Medicare assignment and how does it work?

Kimberly Lankford,

​Because Medicare decides how much to pay providers for covered services, if the provider agrees to the Medicare-approved amount, even if it is less than they usually charge, they’re accepting assignment.

A doctor who accepts assignment agrees to charge you no more than the amount Medicare has approved for that service. By comparison, a doctor who participates in Medicare but doesn’t accept assignment can potentially charge you up to 15 percent more than the Medicare-approved amount.

That’s why it’s important to ask if a provider accepts assignment before you receive care, even if they accept Medicare patients. If a doctor doesn’t accept assignment, you will pay more for that physician’s services compared with one who does.

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How much do I pay if my doctor accepts assignment?

If your doctor accepts assignment, you will usually pay 20 percent of the Medicare-approved amount for the service, called coinsurance, after you’ve paid the annual deductible. Because Medicare Part B covers doctor and outpatient services, your $240 deductible for Part B in 2024 applies before most coverage begins.

All providers who accept assignment must submit claims directly to Medicare, which pays 80 percent of the approved cost for the service and will bill you the remaining 20 percent. You can get some preventive services and screenings, such as mammograms and colonoscopies , without paying a deductible or coinsurance if the provider accepts assignment. 

What if my doctor doesn’t accept assignment?

A doctor who takes Medicare but doesn’t accept assignment can still treat Medicare patients but won’t always accept the Medicare-approved amount as payment in full.

This means they can charge you up to a maximum of 15 percent more than Medicare pays for the service you receive, called “balance billing.” In this case, you’re responsible for the additional charge, plus the regular 20 percent coinsurance, as your share of the cost.

How to cover the extra cost? If you have a Medicare supplement policy , better known as Medigap, it may cover the extra 15 percent, called Medicare Part B excess charges.

All Medigap policies cover Part B’s 20 percent coinsurance in full or in part. The F and G policies cover the 15 percent excess charges from doctors who don’t accept assignment, but Plan F is no longer available to new enrollees, only those eligible for Medicare before Jan. 1, 2020, even if they haven’t enrolled in Medicare yet. However, anyone who is enrolled in original Medicare can apply for Plan G.

Remember that Medigap policies only cover excess charges for doctors who accept Medicare but don’t accept assignment, and they won’t cover costs for doctors who opt out of Medicare entirely.

Good to know. A few states limit the amount of excess fees a doctor can charge Medicare patients. For example, Massachusetts and Ohio prohibit balance billing, requiring doctors who accept Medicare to take the Medicare-approved amount. New York limits excess charges to 5 percent over the Medicare-approved amount for most services, rather than 15 percent.

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How do I find doctors who accept assignment?

Before you start working with a new doctor, ask whether he or she accepts assignment. About 98 percent of providers billing Medicare are participating providers, which means they accept assignment on all Medicare claims, according to KFF.

You can get help finding doctors and other providers in your area who accept assignment by zip code using Medicare’s Physician Compare tool .

Those who accept assignment have this note under the name: “Charges the Medicare-approved amount (so you pay less out of pocket).” However, not all doctors who accept assignment are accepting new Medicare patients.

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What does it mean if a doctor opts out of Medicare?

Doctors who opt out of Medicare can’t bill Medicare for services you receive. They also aren’t bound by Medicare’s limitations on charges.

In this case, you enter into a private contract with the provider and agree to pay the full bill. Be aware that neither Medicare nor your Medigap plan will reimburse you for these charges.

In 2023, only 1 percent of physicians who aren’t pediatricians opted out of the Medicare program, according to KFF. The percentage is larger for some specialties — 7.7 percent of psychiatrists and 4.2 percent of plastic and reconstructive surgeons have opted out of Medicare.

Keep in mind

These rules apply to original Medicare. Other factors determine costs if you choose to get coverage through a private Medicare Advantage plan . Most Medicare Advantage plans have provider networks, and they may charge more or not cover services from out-of-network providers.

Before choosing a Medicare Advantage plan, find out whether your chosen doctor or provider is covered and identify how much you’ll pay. You can use the Medicare Plan Finder to compare the Medicare Advantage plans and their out-of-pocket costs in your area.

Return to Medicare Q&A main page

Kimberly Lankford is a contributing writer who covers Medicare and personal finance. She wrote about insurance, Medicare, retirement and taxes for more than 20 years at  Kiplinger’s Personal Finance  and has written for  The Washington Post  and  Boston Globe . She received the personal finance Best in Business award from the Society of American Business Editors and Writers and the New York State Society of CPAs’ excellence in financial journalism award for her guide to Medicare.

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What does ‘accepting assignment’ mean?

Accepting assignment is a real concern for those who have Original Medicare coverage. Physicians (or any other healthcare providers or facilities) who accept assignment agree to take Medicare’s payment for services. They cannot bill a Medicare beneficiary in excess of the Medicare allowance, which is the copayment or coinsurance. While providers who participate in the Medicare program must accept assignment on all Medicare claims, they do not have to accept every Medicare beneficiary as a patient. 

There are basically three Medicare options for physicians.

• Physicians may sign a participating agreement and accept Medicare’s allowed charge as payment-in-full for all of their Medicare patients. Use the Physician Compare database to find physicians who accept assignment. 
• They may elect to be non-participating, in which case, they make decisions about accepting Medicare assignment on a case-by-case basis. They can bill patients up to 15% more than the Medicare allowance. Some Medigap policies offer a benefit to cover this amount, known as Part B excess charges.
• Or, they may opt out of Medicare entirely and become private contracting physicians.  They establish contracts with their patients to bill them directly. Neither the physicians nor the patients would receive any payments from Medicare.

Accepting assignment can also be a concern for beneficiaries with coverage other than Original Medicare, including those:

• in a Medicare Advantage Private Fee-for-service (PFFS) plan who get services outside the network.
• in a Medicare Advantage Medical Savings Account (MSA) plan because this plan does not utilize networks.

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Physician Acceptance of Medicare Assignment

• Medicare assignment pertains to an agreement between Medicare and participating doctors. Learn more about the physicians that accept Medicare assignment.

Medicare assignment, or Medicare assignment of benefits, is the process in which a Medicare beneficiary authorizes Medicare to directly reimburse health care providers for services. To ensure all services are charged at Medicare-determined rates, recipients should verify whether their primary physicians fall under the accept assignment definition prior to scheduling services. 

What Is the Medicare Accept Assignment Definition?

The Medicare accept assignment definition pertains to physicians, medical suppliers and medical providers that agree to accept Medicare-approved charges as total and full payment for all covered services without adding extra charges. These providers also agree to charge only the allowed Medicare deductible and coinsurance charges to patients. Medicare-approved providers who accept Medicare assignment are referred to as participating providers. 

Non-participating providers may accept Medicare and provide Medicare-covered services. However, as non-participating providers, they are not required to accept Medicare's pre-determined costs for procedures and office visits. Additionally, non-participating providers are legally allowed to charge up to 15% above Medicare-approved amounts. That extra amount is billed to the patient.

In addition to participating and non-participating providers, some providers choose not to accept Medicare in any capacity. These providers are referred to as opt-out providers. Only a small percentage (under 2%) of providers choose to completely opt out.

What Are Some Benefits of Medicare Assignment? 

Medicare recipients who receive primary care through Medicare assignment providers may have lower out-of-pocket costs than recipients who utilize the services of non-participating providers. Providers who accept Medicare assignment must submit all claims directly to Medicare, so recipients can't be charged anything for claim submission. In most cases, Medicare assignment providers wait to charge recipients for their share in costs (when applicable) until after Medicare pays its share, which may help make medical expenses more manageable. 

What May Happen When a Provider Doesn't Accept Assignment? 

In addition to possibly being charged up to an additional 15% for procedures and services, individuals who use non-participating providers may be required to pay full costs for services upfront. Recipients may also need to submit their own insurance claims to Medicare to receive reimbursements. Medicare recipients who receive services through providers who are completely opted out are generally required to pay for all services and procedures, even if they would normally be covered by Medicare. Recipients who prefer to use opt-out providers may be able to set up payment plans through private contracts. 

What Is Part B Medicare Assignment?

Medicare assignment Part B pertains to outpatient services. Recipients who work with participating providers are generally required to pay 20% of allowed amounts out of pocket. Those who choose providers defined as non-participating may be required to pay excess charges of up to 15%. Recipients with health care providers who are completely opted out may be responsible for 100% of costs for services and procedures.

Christian Worstell is a senior Medicare and health insurance writer with HelpAdivsor.com. He is also a licensed health insurance agent. Christian is well-known in the insurance industry for the thousands of educational articles he’s written, helping Americans better understand their health insurance and Medicare coverage.

Christian’s work as a Medicare expert has appeared in several top-tier and trade news outlets including Forbes, MarketWatch, WebMD and Yahoo! Finance.

While at HelpAdvisor, Christian has written hundreds of articles that teach Medicare beneficiaries the best practices for navigating Medicare. His articles are read by thousands of older Americans each month. By better understanding their health care coverage, readers may hopefully learn how to limit their out-of-pocket Medicare spending and access quality medical care.

Christian’s passion for his role stems from his desire to make a difference in the senior community. He strongly believes that the more beneficiaries know about their Medicare coverage, the better their overall health and wellness is as a result.

A current resident of Raleigh, Christian is a graduate of Shippensburg University with a bachelor’s degree in journalism. You can find Christian’s most recent articles in our  blog .

If you’re a member of the media looking to connect with Christian, please don’t hesitate to email our public relations team at  [email protected] .

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What Does It Mean for a Doctor to Accept Medicare Assignment?

Written by: Malini Ghoshal, RPh, MS

Reviewed by: Malinda Cannon, Licensed Insurance Agent

Key Takeaways

Doctors who accept Medicare assignment are paid agreed-upon rates for services.

It’s important to verify that your doctor accepts assignment before receiving services to avoid high out-of-pocket costs.

A doctor or clinician may be “non-participating” but can still agree to accept Medicare assignment for some services.

If you visit a doctor or clinician who has opted out (doesn’t accept Medicare), you may have to pay for your entire visit cost unless it’s a medical emergency.

Medigap Supplemental insurance (Medigap) plans won’t pay for service costs from doctors who don’t accept assignment.

One of the things that Original Medicare beneficiaries often enjoy about their coverage is that they can use it anywhere in the country. Unlike plans with provider networks, they can visit doctors either at home or on the road; both are covered the same.

But do all doctors accept Medicare patients?

Truth is, this wide-ranging coverage area only applies to doctors who accept Medicare assignment. Fortunately, most do. If you’re eligible for Medicare, it’s important to visit doctors and clinicians who accept Medicare assignment. This will help keep your out-of-pocket costs within your control. Doctors who agree to accept Medicare assignment sign an agreement that they’re willing to accept payment from Medicare for their services.

If you’re a current beneficiary or nearing enrollment, you may have other questions. Do all doctors accept Medicare Advantage plans? What about Medicare Supplement insurance (Medigap)? Read on to learn how to find doctors that accept Medicare assignment and how this keeps your healthcare costs down.

Find the Medicare Advantage plan that meets your needs.

What Is Medicare Assignment of Benefits?

When you’re eligible for Medicare, you have the option to visit doctors and clinicians who accept assignment. This means they are Medicare-approved providers who agree to receive Medicare reimbursement rates for covered services. This helps save you money.

If you have Original Medicare (Part A and B), your doctor visits are covered by your Part B plan. Inpatient services such as hospital stays and some skilled nursing care are covered by Part A .

In order for a participating doctor (or facility) to bill Medicare and be reimbursed, you must authorize Medicare to reimburse your doctor directly for your covered services. This is called the Medicare assignment of benefits. You transfer your right to receive Medicare payment for a covered service to your doctor or other provider.

Note: If you have a Medicare Supplement insurance ( Medigap ) plan to pay for out-of-pocket costs, you may also need to sign a separate assignment of benefits form for Medigap reimbursement. More on Medigap below.

How Can I Find Doctors Near Me That Accept Medicare?

There are several ways to find doctors and other clinicians who accept Medicare assignment close to you.

First, let’s take a look at the different types of Medicare providers.

They include:

Participating providers: Medicare-participating doctors and providers sign a participation agreement stating they will accept Medicare reimbursement rates for their services.

Non-participating providers:  Doctors or providers who are non-participating providers are eligible to accept Medicare assignment but haven’t signed a Medicare agreement. They may choose to accept assignment on a case-by-case basis. If you visit a non-participating provider, make sure to ask if they accept assignment for your particular service. Also get a copy of their fees. They will need to select “yes” on Centers for Medicare & Medicaid Services CMS Form 1500 to accept assignment for the service.

Opt-out providers:  Some doctors and other providers choose not to accept Medicare. If they choose to opt out, the period is two years (based on Medicare guidelines). The opt-out automatically renews if the provider doesn’t request a change in their status. You would be responsible for paying all costs for services received from an opt-out provider. You cannot bill Medicare for reimbursement unless the service was an urgent or emergency medical need. According to a report from KFF , roughly 1% of non-pediatric physicians opted out of Medicare in 2023.

Visiting a doctor who doesn’t accept assignment may cost you more. These providers can charge you up to 15% more than the Medicare-approved rate for a given service. This 15% charge is called the limiting charge. Some states limit this extra charge to a certain percent. This may also be called the Part B excess charge.

Here are some tips for finding doctors and providers who accept Medicare assignment:

• The easiest way to find a doctor who accepts Medicare assignment is to contact their office and ask them directly.
• If you’re looking for a new doctor, you can use the Medicare search tool to find clinicians and doctors that accept Medicare assignment.
• You can also ask a state health insurance assistance program (SHIP) representative for help in locating a doctor that accepts Medicare assignment.
• Don’t assume that having a longstanding relationship with your doctor means nothing will ever change. Check in with them to make sure they still accept Medicare assignment and whether they’re planning to opt out.

Note: Your doctor can choose to become a non-participating provider or opt out of participating in Medicare. It’s important to verify they accept Medicare assignment before receiving any services.

Your Ideal Medicare Plan is out there.

Do Doctors Who Accept Medicare Have to Accept Supplement Plans?

If your doctor accepts Medicare assignment and you have Original Medicare (Medicare Part A and Part B) with a Medicare Supplement (Medigap) plan, they will accept the supplemental insurance. Depending on your Medigap plan coverage , it may pay all or part of your out-of-pocket costs such as deductibles, copayments and coinsurance.

However, if you have a Medicare Advantage plan (Part C), you may have a network of covered doctors under the plan. If you visit an out-of-network doctor, you may need to pay all or part of the cost for your services.

Keep in mind that you can’t have a Medigap supplemental plan if you have a Medicare Advantage plan.

If you have questions or want to learn more about different Medicare plans like Original Medicare with Medigap versus Medicare Advantage, GoHealth has licensed insurance agents ready to help. They can shop your different options and offer impartial guidance where you need it.

Do Most Doctors Accept Medicare Advantage Plans?

Many doctors accept Medicare Advantage (Part C) plans, but these plans often use provider networks. These networks are groups of doctors and providers in an area that have agreed to treat an insurance company’s customers. If you have a Part C plan, you may be required to see in-network doctors with few exceptions. However, these types of plans are popular options for all-in-one coverage for your health needs. Plans must offer Part A and B coverage, plus a majority also include Part D , or prescription drug coverage. But whether a doctor accepts a Medicare Advantage plan may depend on where you live and the type of Medicare Advantage plan you have.

There are several types of Medicare Advantage plans including:

• Health Maintenance Organization (HMO): These plans have a network of covered providers, as well as a primary care physician to manage your care. If you visit a doctor outside your plan network, you may have to pay the full cost of your visit.
• Preferred Provider Organization (PPO): You’ll probably still have a primary care physician, but these are more flexible plans that allow you to go out of network in some cases. But you may have to pay more.
• Private Fee for Service (PFFS): You may be able to visit any doctor or provider with these plans, but your costs may be higher.
• Special Needs Plan (SNP): This type of plan is only for certain qualified individuals who either have a specific health condition ( C-SNP ) or who qualify for both Medicaid and Medicare insurance ( D-SNP ).

Looking for a plan with prescription drug coverage?

What Are Medicare Assignment Codes?

Medicare assignment codes help Medicare pay for covered services. If your doctor or other provider accepts assignment and is a participating provider, they will file for reimbursement for services with a CMS-1500 form and the code will be “assigned.”

But non-participating providers can select “not assigned.” This means they are not accepting Medicare-assigned rates for a given service. They can charge up to 15% over the full Medicare rate for the service.

If you go to a doctor or provider who accepts assignment, you don’t need to file your own claim. Your doctor’s office will directly file with Medicare. Always check to make sure your doctor accepts assignment to avoid excess charges from your visit.

Health Insurance Claim Form . CMS.gov.

Lower costs with assignment . Medicare.gov.

How Many Physicians Have Opted-Out of the Medicare Program? KFF.org.

Joining a plan . Medicare.gov.

This website is operated by GoHealth, LLC., a licensed health insurance company. The website and its contents are for informational and educational purposes; helping people understand Medicare in a simple way. The purpose of this website is the solicitation of insurance. Contact will be made by a licensed insurance agent/producer or insurance company. Medicare Supplement insurance plans are not connected with or endorsed by the U.S. government or the federal Medicare program. Our mission is to help every American get better health insurance and save money. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.

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What does it mean to accept assignment on the CMS 1500 claim form – also called the HCFA 1500 claim form.? Should I accept assignment or not? What are the guidelines for accepting assignment in box 27 of the 1500 claim?

These commonly asked questions should have a simple answer, but the number of court cases indicates that it is not as clear cut as it should be. This issue is documented in the book “Problems in Health Care Law” by Robert Desle Miller. The definition appears to be in the hands of the courts. However, we do have some helpful guidelines for you.

One major area of confusion is the relationship between box 12, box 13 and box 27.  These are not interchangeable boxes and they are not necessarily related to each other.

According to the National Uniform Claim Committee (NUCC), the “Accept Assignment” box indicates that the provider agrees to accept assignment.  It simply says to enter an X in the correct box.  It does NOT define what accepting assignment might or might not mean.

It is important to understand that if you are a participating provider in any insurance plan or program, you must first follow the rules according to the contract that you sign. That contract superceeds any guidelines that are included here.

Medicare Instructions / Guidelines

PARTICIPATING providers MUST accept assignment according to the terms of their contract.  The contract itself states:

“Meaning of Assignment – For purposes of this agreement, accepting assignment of the Medicare Part B payment means requesting direct Part B payment from the Medicare program.  Under an assignment , the approved charge, determined by the Medicare carrier, shall be the full charge for the service covered under Part B.  The participant shall not collect from the beneficiary or other person or organization for covered services more than the applicable deductible and coinsurance.”

By law, the providers or types of services listed below MUST also accept assignment:

• Clinical diagnostic laboratory services;
• Physician services to individuals dually entitled to Medicare and Medicaid;
• Services of physician assistants, nurse practitioners, clinical nurse specialists, nurse midwives, certified registered nurse anesthetists, clinical psychologists, and clinical social workers;
• Ambulatory surgical center services for covered ASC procedures;
• Home dialysis supplies and equipment paid under Method II;
• Ambulance services;
• Drugs and biologicals; and
• Simplified Billing Roster for influenza virus vaccine and pneumococcal vaccine.

NON-PARTICIPATING providers can choose whether to accept assignment or not, unless they or the service they are providing is on the list above.

The official Medicare instructions regarding Boxes 12 and 13 are:

“Item 12 – The patient’s signature authorizes release of medical information necessary to process the claim. It also authorizes payments of benefits to the provider of service or supplier when the provider of service or supplier accepts assignment on the claim.” “Item 13 – The patient’s signature or the statement “signature on file” in this item authorizes payment of medical benefits to the physician or supplier. The patient or his/her authorized representative signs this item or the signature must be on file separately with the provider as an authorization. However, note that when payment under the Act can only be made on an assignment-related basis or when payment is for services furnished by a participating physician or supplier, a patient’s signature or a “signature on file” is not required in order for Medicare payment to be made directly to the physician or supplier.”

Regardless of the wording on these instructions stating that it authorizes payments to the physician, this is not enough to ensure that payment will come directly to you instead of the patient.To guarantee payment comes to you, you MUST accept assignment.

Under Medicare rules, PARTICIPATING providers are paid at 80% of the physician fee schedule allowed amount and NON-participating providers are paid at 80% of the allowed amount, which is 5% less than the full Allowed amount for participating providers. Only NON-participating providers may “balance bill” the patient for any amounts not paid by Medicare, however, they are subject to any state laws regarding balance billing.

NON-MEDICARE Instructions / Guidelines

PARTICIPATING providers MUST abide by the terms of their contract.  In most cases, this includes the requirement to accept assignment on submitted claims.

NON-PARTICIPATING providers have the choice to accept or not accept assignment.

YES means that payment should go directly to you instead of the patient.  Generally speaking, even if you have an assignment of benefits from the patient (see box 12 & 13), payment is ONLY guaranteed to go to you IF you accept assignment.

NO is appropriate for patients who have paid for their services in full so they may be reimbursed by their insurance.  It generally means payment will go to the patient.

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Medicare Assignment: Understanding How It Works

Medicare assignment is a term used to describe how a healthcare provider agrees to accept the Medicare-approved amount. Depending on how you get your Medicare coverage, it could be essential to understand what it means and how it can affect you.

What is Medicare assignment?

Medicare sets a fixed cost to pay for every benefit they cover. This amount is called Medicare assignment.

You have the largest healthcare provider network with over 800,000 providers nationwide on Original Medicare . You can see any doctor nationwide that accepts Medicare.

Understanding the differences between your cost and the difference between accepting Medicare and accepting Medicare assignment could be worth thousands of dollars.

Doctors that accept Medicare

Your healthcare provider can fall into one of three categories:

Medicare participating provider and Medicare assignment

Medicare participating providers not accepting medicare assignment, medicare non-participating provider.

More than 97% of healthcare providers nationwide accept Medicare. Because of this, you can see almost any provider throughout the United States without needing referrals.

Let’s discuss the three categories the healthcare providers fall into.

Participating providers are doctors or healthcare providers who accept assignment. This means they will never charge more than the Medicare-approved amount.

Some non-participating providers accept Medicare but not Medicare assignment. This means you can see them the same way a provider accepts assignment.

You need to understand that since they don’t take the assigned amount, they can charge up to 15% more than the Medicare-approved amount.

Since Medicare will only pay the Medicare-approved amount, you’ll be responsible for these charges. The 15% overcharge is called an excess charge. A few states don’t allow or limit the amount or services of the excess charges. Only about 5% of providers charge excess charges.

Opt-out providers don’t accept Original Medicare, and these healthcare providers are in the minority in the United States. If healthcare providers don’t accept Medicare, they won’t be paid by Medicare.

This means choosing to see a provider that doesn’t accept Medicare will leave you responsible for 100% of what they charge you. These providers may be in-network for a Medicare Advantage plan in some cases.

Avoiding excess charges

Excess charges could be large or small depending on the service and the Medicare-approved amount. Avoiding these is easy. The simplest way is to ask your provider if they accept assignment before service.

If they say yes, they don’t issue excess charges. Or, on Medicare.gov , a provider search tool will allow you to look up your healthcare provider and show if they accept Medicare assignment or not.

Medicare Supplement and Medicare assignment

Medigap plans are additional insurance that helps cover your Medicare cost-share . If you are on specific plans, they’ll pay any extra costs from healthcare providers that accept Medicare but not Medicare assigned amount. Most Medicare Supplement plans don’t cover the excess charges.

The top three Medicare Supplement plans cover excess charges if you use a provider that accepts Medicare but not Medicare assignment.

Medicare Advantage and Medicare assignment

Medicare assignment does not affect Medicare Advantage plans since Medicare Advantage is just another way to receive your Medicare benefits. Since your Medicare Advantage plan handles your healthcare benefits, they set the terms.

Most Medicare Advantage plans require you to use network providers. If you go out of the network, you may pay more. If you’re on an HMO, you’d be responsible for the entire charge of the provider not being in the network.

Do all doctors accept Medicare Supplement plans?

All doctors that accept Original Medicare accept Medicare Supplement plans. Some doctors don’t accept Medicare. In this case, those doctors won’t accept Medicare Supplements.

Where can I find doctors who accept Medicare assignment?

Medicare has a physician finder tool that will show if a healthcare provider participates in Medicare and accepts Medicare assignments. Most doctors nationwide do accept assignment and therefore don’t charge the Part B excess charges.

Why do some doctors not accept Medicare?

Some doctors are called concierge doctors. These doctors don’t accept any insurance and require cash payments.

What is a Medicare assignment?

Accepting Medicare assignment means that the healthcare provider has agreed only to charge the approved amount for procedures and services.

What does it mean if a doctor does not accept Medicare assignment?

The doctor can change more than the Medicare-approved amount for procedures and services. You could be responsible for up to a 15% excess charge.

How many doctors accept Medicare assignment?

About 97% of doctors agree to accept assignment nationwide.

Is accepting Medicare the same as accepting Medicare assignment?

No. If a doctor accepts Medicare and accepts Medicare assigned amount, they’ll take what Medicare approves as payment in full.

If they accept Medicare but not Medicare assignment, they can charge an excess charge of up to 15% above the Medicare-approved amount. You could be responsible for this excess charge.

What is the Medicare-approved amount?

The Medicare-approved amount is Medicare’s charge as the maximum for any given medical service or procedure. Medicare has set forth an approved amount for every covered item or service.

Can doctors balance bill patients?

Yes, if that doctor is a Medicare participating provider not accepting Medicare assigned amount. The provider may bill up to 15% more than the Medicare-approved amount.

What happens if a doctor does not accept Medicare?

Doctors that don’t accept Medicare will require you to pay their full cost when using their services. Since these providers are non-participating, Medicare will not pay or reimburse for any services rendered.

Get help avoiding Medicare Part B excess charges

Whether it’s Medicare assignment, or anything related to Medicare, we have licensed agents that specialize in this field standing by to assist.

Give us a call, or fill out our online request form . We are happy to help answer questions, review options, and guide you through the process.

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If you have Original Medicare , your Part B costs once you have met your deductible can vary depending on the type of provider you see. For cost purposes, there are three types of provider, meaning three different relationships a provider can have with Medicare . A provider’s type determines how much you will pay for Part B -covered services.

• These providers are required to submit a bill (file a claim ) to Medicare for care you receive. Medicare will process the bill and pay your provider directly for your care. If your provider does not file a claim for your care, there are troubleshooting steps to help resolve the problem .
• If you see a participating provider , you are responsible for paying a 20% coinsurance for Medicare-covered services.
• Certain providers, such as clinical social workers and physician assistants, must always take assignment if they accept Medicare.
• Non-participating providers can charge up to 15% more than Medicare’s approved amount for the cost of services you receive (known as the limiting charge ). This means you are responsible for up to 35% (20% coinsurance + 15% limiting charge) of Medicare’s approved amount for covered services.
• Some states may restrict the limiting charge when you see non-participating providers. For example, New York State’s limiting charge is set at 5%, instead of 15%, for most services. For more information, contact your State Health Insurance Assistance Program (SHIP) .
• If you pay the full cost of your care up front, your provider should still submit a bill to Medicare. Afterward, you should receive from Medicare a Medicare Summary Notice (MSN) and reimbursement for 80% of the Medicare-approved amount .
• The limiting charge rules do not apply to durable medical equipment (DME) suppliers . Be sure to learn about the different rules that apply when receiving services from a DME supplier .
• Medicare will not pay for care you receive from an opt-out provider (except in emergencies). You are responsible for the entire cost of your care.
• The provider must give you a private contract describing their charges and confirming that you understand you are responsible for the full cost of your care and that Medicare will not reimburse you.
• Opt-out providers do not bill Medicare for services you receive.
• Many psychiatrists opt out of Medicare.

Providers who take assignment should submit a bill to a Medicare Administrative Contractor (MAC) within one calendar year of the date you received care. If your provider misses the filing deadline, they cannot bill Medicare for the care they provided to you. However, they can still charge you a 20% coinsurance and any applicable deductible amount.

Be sure to ask your provider if they are participating, non-participating, or opt-out. You can also check by using Medicare’s Physician Compare tool .

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