What "Accepts Medicare Assignment" Really Means
Every provider card on this site shows whether they accept Medicare assignment — it's the single detail that most affects what you'll actually pay. Here's what it means, in plain terms.
The short version
Accepting assignment means a doctor agrees to take Medicare's approved amount as full payment for a covered service. You owe your normal Part B deductible and 20% coinsurance — nothing extra. The office bills Medicare directly and usually waits for Medicare's payment before asking you for your share.
What changes if a doctor doesn't accept assignment
A doctor who doesn't accept assignment can still treat Medicare patients — but they're allowed to charge more. Specifically, non-participating providers can charge up to 15% above the Medicare-approved amount, known as an "excess charge" or limiting charge. You may also need to pay the full bill upfront and file for Medicare to reimburse your share, rather than the office billing Medicare directly. It's worth asking about assignment status before your first visit, especially for an expensive procedure — that 15% adds up.
The "may accept assignment" badge
Some providers on this site show as "may accept assignment" rather than a flat yes. This usually reflects a provider who bills through a group practice where assignment can be decided per claim rather than fixed for every visit. It isn't a red flag — just a reason to ask the office directly which applies to your visit.
A quick example
Say a covered office visit has a Medicare-approved amount of $150. If your doctor accepts assignment, after your deductible is met you owe 20% coinsurance — $30. If your doctor doesn't accept assignment, they can charge up to 15% more than $150 (that is, up to $172.50), and your 20% coinsurance is based on the higher, non-participating fee schedule too — so your total out-of-pocket cost is higher on both counts.
Frequently Asked Questions
What does it mean when a doctor accepts Medicare assignment?
It means the doctor agrees to accept the Medicare-approved amount as full payment for a covered service. You pay only your deductible and 20% coinsurance — the doctor can't charge you more, and they bill Medicare directly.
What happens if a doctor doesn't accept assignment?
They can still see Medicare patients, but they can charge up to 15% more than the Medicare-approved amount — called an "excess charge" or "limiting charge." You may also have to pay upfront and wait for Medicare to reimburse you, rather than the office billing Medicare directly.
What does "may accept assignment" mean on this site?
It means CMS enrollment data shows the provider's assignment status can vary — often because they bill through a group that handles assignment differently by visit or service. Ask the office directly when you call.
How common is it for doctors to accept assignment?
Most do. Assignment is standard for providers enrolled in Medicare as "participating" providers, and the large majority of Medicare-enrolled clinicians fall into this group. Still, always confirm — it can affect your bill.
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Sources: Medicare.gov, "Does your provider accept Medicare as full payment?". This is directory and program information, not medical or insurance advice. Last reviewed August 2026.