Medicare Part B does not require referrals for most services, but some plans and situations do

Original Medicare (Part A and Part B) lets you see most doctors and specialists without asking your primary care doctor first. You can go directly to a cardiologist, dermatologist, or any other specialist covered by Medicare. No referral needed, no permission required.

However, Medicare Advantage plans (Part C) often do require referrals — sometimes for any specialist visit, sometimes only for certain types of care. And even in Original Medicare, a few services do need prior approval from Medicare itself before you receive them. The difference matters because ignoring a referral requirement or skipping prior approval can mean you pay the full bill instead of your normal copay or coinsurance.

The rule is straightforward to state and confusing to live by: check your specific plan's rules before you schedule, because the answer depends on which type of Medicare you have and which service you need.

Key Takeaways

  • Original Medicare does not require referrals for specialist visits, but Medicare Advantage plans usually do.
  • Some services in Original Medicare need prior approval from Medicare before you receive them, even though no referral is required.
  • Your plan documents or member services phone line can tell you whether a specific service needs a referral or prior approval.
  • Receiving care without required approval or referral can leave you responsible for the full cost, not just your copay.
  • Your doctor's office can often handle referral requests and prior approval paperwork on your behalf.

Original Medicare and the no-referral rule

If you have Original Medicare, you do not need a referral to see a specialist. You can call a cardiologist, orthopedic surgeon, or any other doctor directly and schedule an appointment. Medicare will cover the visit at the same rate whether your primary care doctor referred you or you found the doctor yourself.

This freedom is one of the main differences between Original Medicare and Medicare Advantage. You are not locked into a network, and you do not need permission from a gatekeeper doctor. If you want a second opinion, you can get one without telling anyone. If you want to see a rheumatologist for your arthritis without mentioning it to your family doctor, that is your choice.

The catch is that some services still need prior approval from Medicare — not from your doctor, but from Medicare itself — before you receive them. This is different from a referral. A referral is a recommendation from one doctor to another. Prior approval is Medicare saying "yes, we will pay for this" before you get the service.

Medicare Advantage plans usually require referrals

Most Medicare Advantage plans work like the health insurance you may have had when you were working. You choose a primary care doctor, and that doctor acts as a gatekeeper. If you want to see a specialist, you ask your primary care doctor for a referral first. The referral tells the specialist that your primary care doctor thinks you need that care, and it tells Medicare Advantage that the visit is medically necessary.

Some Medicare Advantage plans are stricter than others. A few plans let you see certain specialists — like gynecologists or eye doctors — without a referral. But most plans require a referral for any specialist visit. Check your plan's member handbook or call member services to find out which specialists need referrals and which do not.

If you see a specialist without a required referral, the plan may refuse to pay. You could end up owing the full cost of the visit. Some plans will pay anyway but charge you a higher copay. Either way, it is worth the five-minute phone call to your primary care doctor's office to get the referral before you schedule.

Services that need prior approval in Original Medicare

Even though Original Medicare does not require referrals, some services do need prior approval before you receive them. This means Medicare needs to review the request and say yes before you have the procedure or service. If you skip this step, Medicare may not pay, and you will owe the bill.

Common services that often need prior approval in Original Medicare include certain imaging tests (like MRI or CT scans), some surgeries, home health care, skilled nursing facility stays, and some mental health or rehabilitation services. The exact list changes, and not every imaging test or surgery needs approval — it depends on the specific situation and the reason for the service.

Your doctor's office usually handles prior approval requests. When you schedule the service, tell the office that you have Original Medicare and ask whether prior approval is needed. If it is, the office will submit the request to Medicare on your behalf. This typically takes a few business days. Do not schedule the service until approval comes back.

How to find out what your plan requires

The fastest way to know whether you need a referral or prior approval is to call your plan's member services number. This number is on your insurance card and in your member handbook. Have the name of the doctor or service ready, and ask directly: "Do I need a referral to see this doctor?" or "Does this service need prior approval?"

You can also check your plan's member handbook, which usually lists referral requirements by specialty. However, the handbook can be long and hard to search, so a phone call is often faster. Member services representatives answer this question many times a day and can give you a straight answer in minutes.

If you are not sure whether a service needs prior approval, ask your doctor's office. They bill Medicare regularly and usually know which services require approval. If they are unsure, they can call Medicare or your plan to check before you schedule.

What happens if you skip the referral or prior approval

If your Medicare Advantage plan requires a referral and you see a specialist without one, the plan may deny the claim. You will receive a bill for the full cost of the visit. Some plans will pay anyway but charge you a higher copay — usually $50 to $100 instead of $20 to $30. Either way, you pay more than you should have.

If you receive a service in Original Medicare that needs prior approval but you did not get it first, Medicare may deny the claim. You become responsible for the full bill. Some providers will write off the bill if they did not check for prior approval requirements, but you cannot count on that. It is your responsibility to make sure approval is in place before you receive the service.

If you already received care without the required referral or approval and received a bill, contact your plan or Medicare to explain what happened. Sometimes they will reconsider if the service was medically necessary and the provider did not tell you approval was needed. But it is much easier to get the referral or approval before the visit.

Referrals and prior approval for urgent or emergency care

If you need urgent or emergency care, you do not need a referral or prior approval first. Go to the emergency room or urgent care clinic when ready. Call 911 if it is life-threatening. Your plan will cover emergency services even without a referral, and Medicare will pay for emergency care in Original Medicare without prior approval.

After the emergency is over, tell your primary care doctor (if you have a Medicare Advantage plan) or your regular doctor what happened. If you were admitted to the hospital or need follow-up care, your hospital or emergency room doctor can help arrange any referrals or prior approvals needed for the next steps.

Frequently Asked Questions

Can my doctor's office submit a referral for me in a Medicare Advantage plan?

Yes. When you call to schedule a specialist appointment, tell the office you have a Medicare Advantage plan and ask them to request the referral from your primary care doctor. Most offices do this routinely. The referral usually comes through within a few business days, and the specialist's office will not schedule you until they receive it.

Do I need a referral to see my eye doctor or dentist on Medicare?

Original Medicare does not require referrals for eye doctors. Dental care is not covered by Original Medicare at all. Medicare Advantage plans vary — some cover dental and may require a referral, others do not cover it. Check your plan documents or call member services to find out what your plan covers.

What is the difference between a referral and prior approval?

A referral is a recommendation from your primary care doctor to a specialist, usually required by Medicare Advantage plans. Prior approval is permission from Medicare (or your plan) that a service is medically necessary and will be paid for. Original Medicare does not require referrals but does require prior approval for some services.

If I have Original Medicare, can I see any doctor I want?

Yes, as long as the doctor accepts Medicare. You do not need a referral. However, some services still need prior approval from Medicare before you receive them. Ask your doctor's office whether prior approval is needed before you schedule.

What should I do if I received a bill for a visit without a referral?

Contact your plan or Medicare when ready and explain that you did not know a referral was required. Ask whether the claim can be reconsidered. If the provider did not inform you of the referral requirement, they may be responsible for the bill instead of you. Keep copies of any bills and correspondence.