Most doctors accept Medicare, but not all, and acceptance varies by location and specialty
About 9 in 10 primary care doctors accept Medicare nationwide, but that number drops for specialists, and it depends heavily on where you live. Some rural areas have far fewer participating doctors than cities do. The real question is not whether Medicare is widely accepted — it is — but whether the specific doctors you want to see take it, and what you will pay if they do not.
Medicare divides doctors into two groups: those who have signed an agreement with Medicare (called "participating providers") and those who have not. Participating providers agree to accept Medicare's payment as full payment for most services. Non-participating providers can charge you more, though there are limits. A small number of doctors have opted out of Medicare entirely and do not bill Medicare at all.
Key Takeaways
- Participating providers accept Medicare payment as full payment and are listed in the official Medicare provider search tool.
- Non-participating providers can charge you more than Medicare allows, but Medicare still pays its share and limits what you owe.
- Doctors who have opted out of Medicare do not bill Medicare and require you to pay out of pocket, though you can ask for a refund from Medicare yourself.
- You can search for participating doctors by name, location, or specialty on Medicare.gov, and you should confirm acceptance before your first visit.
- If your doctor stops accepting Medicare, you have time to find a new one before your coverage changes.
How to learn about your doctor takes Medicare
The fastest way is to call your doctor's office directly and ask: "Do you accept Medicare?" Most offices know the answer when ready. If you do not have a doctor yet, use the Medicare Provider Search tool on Medicare.gov. Type in the doctor's name or specialty, add your city or ZIP code, and the tool shows you participating providers near you.
The search results show whether each doctor is a participating provider (accepts Medicare assignment) or non-participating (does not accept assignment). If a doctor does not appear in the search, they either do not accept Medicare or have opted out. You can also call your Medicare plan directly — whether Original Medicare or a Medicare Advantage plan — and ask them for a list of doctors in your area who accept your specific plan.
When you find a doctor, ask one more question: "Will you accept my Medicare coverage?" Some doctors accept Original Medicare but not certain Medicare Advantage plans, or vice versa. Getting this straight before your first appointment saves you from surprises at the front desk.
What happens if your doctor is a participating provider
A participating provider has agreed to accept Medicare's approved amount as payment in full. Medicare pays its share (usually 80% of the approved amount after you meet your deductible), and you pay your share (usually 20%). You never pay more than that, even if the doctor's normal fee is higher.
Participating providers must also file your Medicare claim for you — you do not have to do it yourself. Your bill comes from Medicare and the doctor's office, not from you. This is the simplest arrangement and the one most people have.
What happens if your doctor is non-participating
A non-participating provider does not accept Medicare assignment, meaning they do not agree to accept Medicare's approved amount as full payment. They can charge you more than Medicare allows. However, there is a limit: they cannot charge more than 15% above what Medicare approves.
Here is how the money flows: Medicare still pays its share (usually 80% of the approved amount). You pay your 20% share, plus the extra amount the doctor charges above Medicare's approved fee. The doctor's office usually files the claim for you, but you may have to pay upfront and seek reimbursement.
Example: Medicare approves $100 for a service. A non-participating doctor can charge up to $115. Medicare pays $80 (its 80% share). You pay $35 — your $20 share plus the $15 overage. You are responsible for asking the doctor's office about their fees before your visit so you know what to expect.
What happens if your doctor has opted out of Medicare
A small number of doctors have signed an opt-out agreement with Medicare, meaning they do not bill Medicare at all. These doctors require you to pay out of pocket for all services. Medicare will not pay anything toward their bills.
Before an opted-out doctor treats you, they must give you a written notice explaining that they do not accept Medicare and that you will be responsible for the full cost. You can ask Medicare to reimburse you after you pay, though Medicare will only pay what it would have paid if the doctor were participating — you still absorb the difference.
Opted-out doctors are rare and usually found in specialized practices. If your regular doctor opts out, you will receive advance notice, usually 30 days or more, giving you time to find a new doctor.
Medicare Advantage plans have different rules than Original Medicare
If you have a Medicare Advantage plan (Part C), the rules are stricter. Your plan has a specific network of doctors, and you usually must see doctors in that network to get the best rates. Seeing an out-of-network doctor costs you much more or may not be covered at all, depending on your plan.
When you join a Medicare Advantage plan, you receive a list of participating doctors. Before you switch plans or move to a new area, check whether your current doctor is in the new plan's network. Many people lose their doctor when they change plans because the doctor is not in the new network.
You can call your Medicare Advantage plan's customer service line to confirm that a specific doctor is in-network, or search the plan's website for a provider directory.
What to do if your doctor stops accepting Medicare
Doctors sometimes stop accepting Medicare or stop accepting certain Medicare plans. If your doctor tells you they are dropping Medicare, you have time to find a new one. Medicare requires doctors to give patients at least 30 days' notice before they stop accepting Medicare, so you will not be left without coverage.
Use the Medicare Provider Search tool to find a new participating doctor in your area. If you have a Medicare Advantage plan, check your plan's provider directory. If you have trouble finding a doctor who accepts your plan, call your plan or your local Area Agency on Aging — they can point you toward doctors who are currently accepting new Medicare patients.
Frequently Asked Questions
Can I see a doctor who does not accept Medicare?
Yes, but you will pay more. If the doctor is non-participating, Medicare limits what they can charge you (15% above the approved amount). If the doctor has opted out, you pay the full fee and must seek reimbursement from Medicare yourself. Always ask about fees before your visit.
Do all specialists accept Medicare?
No. Specialists are less likely to accept Medicare than primary care doctors, especially in rural areas. Cardiologists, orthopedic surgeons, and dermatologists vary widely by location. Always confirm before scheduling, because specialist visits are expensive and you do not want billing surprises.
If I switch Medicare Advantage plans, will my doctor still be covered?
Not necessarily. Each Medicare Advantage plan has its own network. Your current doctor may be in one plan's network but not another's. Check the new plan's provider directory before you switch, or call the plan to confirm your doctor is included.
What does it mean when a doctor "accepts Medicare assignment"?
It means the doctor agrees to accept Medicare's approved amount as full payment. You pay your share (usually 20% after the deductible), and the doctor cannot bill you for anything beyond that. This is the standard arrangement with participating providers.
How do I know if a doctor has opted out of Medicare?
Call the doctor's office and ask directly. Opted-out doctors are rare. If a doctor has opted out, they must give you written notice before treating you, explaining that you will pay out of pocket and that Medicare will not reimburse them.