Not all doctors accept Medicare, but most do — and the ones who don't must tell you upfront
Medicare is accepted by the majority of doctors in the United States, but acceptance is voluntary. A doctor can choose not to participate in Medicare at all, or can participate but see only a limited number of Medicare patients. If a doctor does not accept Medicare, they must inform you before you receive care and get your written agreement to pay out of pocket.
The key is knowing the difference between doctors who participate in Medicare, doctors who are enrolled but don't take new Medicare patients, and doctors who have opted out entirely. Each situation affects what you pay and what paperwork you need to handle.
Key Takeaways
- Most doctors participate in Medicare and accept it as payment, but participation is voluntary and varies by specialty and location.
- You can search the Medicare Provider Enrollment, Chain, and Ownership System (PECOS) or call 1-800-MEDICARE to confirm whether a specific doctor accepts Medicare.
- Doctors who opt out of Medicare entirely must give you written notice and a signed agreement before treating you, and you will pay the full bill yourself.
- If a doctor participates in Medicare but has stopped taking new Medicare patients, they must still tell you this before your first visit.
- Medicare Advantage plans (Part C) have their own networks, so a doctor who accepts Original Medicare may not be in your Advantage plan's network.
How to learn about your doctor accepts Medicare
The fastest way is to call your doctor's office directly and ask: "Do you accept Medicare?" Most staff can answer this in seconds. If you are looking for a new doctor, you can search before scheduling.
Medicare maintains a searchable database called PECOS (Provider Enrollment, Chain, and Ownership System) at pecos.cms.gov. You can search by doctor name, location, or medical specialty. The database shows whether the provider is enrolled in Medicare and whether they are currently accepting new patients.
You can also call 1-800-MEDICARE (1-800-633-4227) and ask whether a specific doctor accepts Medicare. The line is open 24 hours a day, seven days a week. Have the doctor's name and location ready.
If you have a Medicare Advantage plan (Part C), check your plan's provider directory first. A doctor may accept Medicare but not be in your specific plan's network, which means you would pay more or have to go out of network.
Doctors who participate in Medicare
A participating provider has signed an agreement with Medicare and accepts Medicare as payment. They agree to charge you only what Medicare allows, and they bill Medicare directly. You pay your share (deductible, copay, or coinsurance) and Medicare pays theirs.
Participating doctors must accept Medicare's approved amount as payment in full for covered services. They cannot balance-bill you — that is, they cannot charge you extra on top of what Medicare pays. This protects you from surprise bills.
Most primary care doctors, cardiologists, orthopedists, and other common specialists participate in Medicare. Participation rates are highest in urban areas and lower in rural areas, though this varies by state and specialty.
Doctors who have opted out of Medicare
Some doctors choose not to participate in Medicare at all. This is called opting out. These doctors do not bill Medicare and do not accept Medicare as payment. If you see an opted-out doctor, you pay the full bill yourself, and Medicare will not reimburse you.
Before an opted-out doctor can treat you, they must give you written notice that they do not participate in Medicare and must get your signed agreement that you understand you will pay the full cost. This agreement must happen before your first visit. If a doctor treats you without this agreement, they cannot bill you.
Some opted-out doctors charge less than Medicare's approved amount because they do not have to follow Medicare's rules. Others charge more. You have no way to know until you ask. If you choose to see an opted-out doctor, ask for their fee schedule in writing before your appointment.
Doctors who participate but limit Medicare patients
Some doctors participate in Medicare but have decided to stop taking new Medicare patients. This is different from opting out entirely. These doctors still see their existing Medicare patients but will not schedule new ones.
The doctor's office must tell you this before your first visit. If you call to schedule and they say they are not taking new Medicare patients, you have two choices: ask to be placed on a waiting list (some doctors do this), or find another doctor who is accepting new patients.
This situation is more common in areas where there are many Medicare patients and fewer doctors, or in specialties where demand is high. It does not mean the doctor is rejecting you personally — it means their practice is full.
What happens if a doctor refuses to accept Medicare
If a doctor does not accept Medicare and you did not sign an opt-out agreement beforehand, the doctor cannot bill you for the visit. You should not have to pay. If you were charged, contact the doctor's office and ask them to reverse the charge, or file a complaint with your state medical board.
If you signed an opt-out agreement and then decided you want Medicare to pay, you cannot ask Medicare to reimburse you after the fact. The agreement you signed means you chose to pay out of pocket. Read any agreement carefully before you sign.
If you believe a doctor balance-billed you (charged you extra beyond what Medicare allows), you can report this to Medicare by calling 1-800-MEDICARE or filing a complaint online at cms.gov.
Medicare Advantage plans and doctor networks
If you have a Medicare Advantage plan (Part C), the rules are different. Advantage plans are run by private insurance companies and have their own networks of doctors. A doctor may accept Original Medicare but not be in your Advantage plan's network.
Always check your plan's provider directory before scheduling. If you see a doctor outside your network, you may have to pay more or the visit may not be covered at all. Some Advantage plans allow out-of-network care for emergencies, but routine visits are usually network-only.
If your doctor leaves your Advantage plan's network, your plan should notify you. You then have the right to switch to a different Advantage plan or go back to Original Medicare during the annual enrollment period (October 15 to December 7).
Frequently Asked Questions
Can a doctor refuse to see me because I have Medicare?
No. A doctor cannot refuse to treat you solely because you have Medicare. However, a doctor can choose not to participate in Medicare at all, or can stop taking new Medicare patients. If they do either, they must tell you before your first visit.
What is balance billing and can a Medicare doctor do it?
Balance billing is when a doctor charges you more than Medicare's approved amount. A participating Medicare doctor cannot balance-bill you. If a doctor who accepts Medicare charges you extra, report it to 1-800-MEDICARE. An opted-out doctor can charge whatever they want, which is why you must sign an agreement first.
If my doctor stops accepting Medicare, what do I do?
Your doctor's office should notify you. You can then find a new doctor who accepts Medicare using PECOS or by calling 1-800-MEDICARE. If you have a Medicare Advantage plan, check your plan's directory for in-network doctors in your area.
Does my Medicare Advantage plan cover doctors outside the network?
Most Advantage plans require you to use in-network doctors for routine care. Out-of-network care may not be covered or may cost you much more. Check your plan's provider directory and your plan documents before scheduling with a doctor outside the network.
How do I know if a doctor is in my Medicare Advantage plan's network?
Call your plan directly or log into your plan's website and search their provider directory by doctor name or specialty. You can also call the customer service number on your insurance card. Do not assume a doctor is in-network just because they accept Medicare.