Out-of-Network Medicare Coverage: What You Pay and When
Whether out-of-network care is covered depends on which kind of Medicare you have. Original Medicare has no network at all. Medicare Advantage HMOs generally cover out-of-network care only in emergencies and a few other cases. Medicare Advantage PPOs cover it, but you usually pay more. At Almond Insurance, we help people in Northern Illinois and Southern Wisconsin match a plan’s network to the doctors they already see, so the question is settled before enrollment rather than at the pharmacy counter or the billing office.
TL;DR
- Original Medicare (Parts A and B) has no provider network. You can see any doctor or hospital in the U.S. that takes Medicare, though you may pay more if the doctor does not accept assignment.
- Medicare Advantage HMOs generally cover only in-network care. Emergencies, out-of-area urgent care and temporary out-of-area dialysis are the main exceptions.
- Medicare Advantage PPOs cover out-of-network providers for covered services, usually at a higher cost. The provider must be willing to treat you and must not have opted out of Medicare.
- Part D works the same way in principle: an out-of-network pharmacy can leave you paying the full price of your drugs.
- If a plan denies a claim, you have 65 calendar days from the date of the denial notice to ask for a reconsideration.
Table of Contents
- What “out of network” means in Medicare
- Original Medicare: no network, but one thing to check
- Medicare Advantage HMOs: stay in network, with exceptions
- Medicare Advantage PPOs: out-of-network care at a higher price
- Side-by-side: how each type treats out-of-network care
- What out-of-network care costs under a Medicare Advantage plan
- Prescriptions: the out-of-network pharmacy
- Switching plans: the 90-day transition protection
- Coverage must still follow Medicare’s rules
- How to check a provider before you go
- If your plan denies an out-of-network claim
- Choosing a plan so network surprises don’t happen
- How Almond Insurance can help
- FAQ
- Sources
What “out of network” means in Medicare
A network is the group of doctors, hospitals, pharmacies and other providers that a private health plan has contracted with. Staying inside it normally means lower, predictable costs. Going outside it can mean higher bills, a denied claim, or paying everything yourself.
The word only applies to some kinds of Medicare. Original Medicare is run by the federal government and has no network. Medicare Advantage (also called Part C) and Part D drug plans are sold by private insurers, and those insurers build networks. So the first step in understanding your own situation is knowing which of those you have. If you are not sure, look at your red, white and blue Medicare card and at any separate plan card from an insurance company. A plan card usually means you are in Medicare Advantage, a Part D plan, or both.
Original Medicare: no network, but one thing to check
Original Medicare does not have a provider network. According to Medicare.gov, you can go to any doctor or hospital that takes Medicare anywhere in the U.S., including the 50 states, D.C. and the territories. You also generally do not need a referral to see a specialist.
What matters here is not the network but whether the provider accepts assignment. That is Medicare’s term for a provider agreeing to take the Medicare-approved amount as full payment. Per Medicare.gov’s provider acceptance page, a provider who accepts assignment:
- charges you only the Medicare deductible and coinsurance,
- submits the claim directly to Medicare, and
- cannot charge you for submitting the claim.
Providers who take Medicare but do not accept assignment are called non-participating. The same page explains that in many cases they can charge up to 15% above the Medicare-approved amount, known as the limiting charge, and you might have to pay the full amount at the time of service and wait for reimbursement.
A worked example
Suppose Medicare approves $200 for a service. A provider who accepts assignment bills you the usual coinsurance on that $200. A non-participating provider may bill up to 15% more, which is $230 in total, and the extra $30 is yours. The amounts here are only an illustration of the 15% rule. Your real bill depends on the service, whether you have met your Part B deductible, and whether you carry a Medicare Supplement plan.
That last point is why many people on Original Medicare add a Medigap policy. Our page on Medicare Supplement and Medigap guidance explains how that coverage sits on top of Original Medicare.
Medicare Advantage HMOs: stay in network, with exceptions
In a Medicare Advantage HMO, you generally must get your care from providers in the plan’s network. Medicare.gov’s HMO page lists the main exceptions, which are covered whether the provider is in or out of network:
- emergency care,
- urgent care when you are out of the plan’s service area, and
- temporary out-of-area dialysis.
Outside those exceptions, an HMO may pay nothing for a non-network doctor, and the whole bill becomes yours. HMOs also commonly ask you to pick a primary care doctor and get referrals to specialists, so the network matters for who you can see and in what order.
Emergencies and urgent care
An emergency is a situation where you reasonably believe your health is in serious danger. In those cases, you should go to the nearest emergency room, not worry about the plan’s network. Medicare Advantage plans cannot require prior authorization (advance approval) for emergency services, urgent care or stabilization services, according to the Washington State Insurance Commissioner’s SHIBA training workbook. SHIBA is that state’s free Medicare counseling program, and its workbook summarizes federal rules.
Traveling in the U.S.
Many readers in the Rockford area spend winters in the South. If you have a Medicare Advantage plan, Medicare Interactive notes that your plan may or may not cover care outside its service area, and that some plans offer special benefits if you travel continuously in the U.S. for up to 12 months, with limits on where and what is covered. Read your plan’s Evidence of Coverage before a long trip, or call the number on your plan card. Original Medicare, by contrast, works in all states.
Medicare Advantage PPOs: out-of-network care at a higher price
A PPO (Preferred Provider Organization) plan gives you more freedom. According to the Medicare.gov guide to Medicare Advantage plans, you can use out-of-network providers for covered services but will usually pay more, and the provider must agree to treat you and must not have opted out of Medicare.
That second condition catches people off guard. A PPO’s out-of-network benefit does not force any doctor to see you. It only means the plan will pay its share if the doctor is willing.
Two more PPO features are worth knowing:
- Referrals. PPO plans typically do not require referrals to see a specialist, per the SHIBA workbook.
- Prior authorization. The same workbook states that Medicare Advantage plans cannot use prior authorization for out-of-network services covered by a PPO. Rules on in-network services differ, and Medicare.gov says Medicare Advantage plans may require approval before covering certain services or supplies.
Private fee-for-service (PFFS) plans
PFFS plans are less common. Medicare.gov’s plan comparison page says you can go to any Medicare-approved provider or facility that accepts the plan’s payment terms. If you use an out-of-network provider who agrees to those terms, you may pay more. Whether a doctor accepts the plan’s terms is something to confirm before each visit.
Side-by-side: how each type treats out-of-network care
| Coverage type | Provider network? | Out-of-network care | Referrals |
|---|---|---|---|
| Original Medicare (Parts A and B) | None | Any provider that takes Medicare; costs rise if the provider does not accept assignment | Generally not needed |
| Medicare Advantage HMO | Yes | Generally not covered, except emergency, out-of-area urgent care and temporary out-of-area dialysis | Often required |
| Medicare Advantage PPO | Yes | Covered for covered services, usually at higher cost, if the provider agrees to treat you | Typically not required |
| Medicare Advantage PFFS | Sometimes | Allowed if the provider accepts the plan’s payment terms; you may pay more | Check the plan |
What out-of-network care costs under a Medicare Advantage plan
Every Medicare Advantage plan has a yearly limit on what you pay out of pocket for covered Medicare services. Medicare.gov says this limit may differ for in-network and out-of-network services, and that once you reach it, you pay nothing for covered services for the rest of the year.
The SHIBA workbook from July 2025 explains the usual pattern. HMO plans typically have one in-network maximum out-of-pocket limit. PPO plans have two: one for in-network costs, and a second, higher one for in-network and out-of-network costs combined.
In practice, this means a PPO’s out-of-network freedom has a price that shows up in two places: higher copays or coinsurance on each service, and a larger ceiling before your protection kicks in. Costs for services that the plan does not cover at all do not count toward the limit. If you want to see what the cap does and does not include, our article on the Medicare Advantage out-of-pocket maximum walks through it, and what Medicare Advantage costs you in 2026 covers premiums, copays and the rest.
Prescriptions: the out-of-network pharmacy
Networks apply to drug coverage as well. Medicare.gov warns that if you use an out-of-network pharmacy for your Part D coverage, you might have to pay the full cost of your drugs. Your plan lists which pharmacies are in its network, and some are “preferred” with lower prices. A pharmacy you have used for years might be in one plan’s network and not in another’s.
This is one of the easiest network problems to prevent. When you compare drug plans, bring the exact list of medications, doses and your pharmacy. Our Part D prescription review is built around that comparison.
Switching plans: the 90-day transition protection
People worry that joining a new Medicare Advantage plan will interrupt a treatment already underway with a doctor who is not in the new plan’s network. The SHIBA workbook states that new Medicare Advantage enrollees must have a minimum 90-day transition period during which the new plan cannot require prior authorization for ongoing treatments, even if they started with an out-of-network provider.
This gives you time to sort things out, but it does not make a non-network doctor a permanent part of the plan. Use those 90 days to check whether your doctor can join the network, or whether another in-network specialist is the right fit. Our guide to Medicare provider networks covers how to keep your doctor when you change plans.
Coverage must still follow Medicare’s rules
A plan cannot simply decide that something Medicare covers is not covered because of the network. According to the SHIBA workbook, Medicare Advantage organizations must follow medical necessity requirements in 42 CFR § 422.101©, consider your individual situation, including your medical history and your doctor’s recommendations, and follow Original Medicare’s coverage criteria. That protects you when a plan is deciding whether a covered service is appropriate for you.
How to check a provider before you go
A few minutes of checking beats a surprise bill. Use this routine for every new doctor, hospital, specialist or pharmacy:
- Identify your coverage type. Original Medicare, HMO, PPO or PFFS. The rules above depend on it.
- Confirm Medicare participation. For Original Medicare, ask the office whether it accepts assignment. For any plan, ask whether the doctor has opted out of Medicare.
- Check the plan’s provider directory, then call the office. Directories can lag behind reality, so confirm that the doctor currently takes your specific plan, not just the insurer’s name.
- Ask whether the service needs prior authorization or a referral. HMOs often require referrals, and Medicare Advantage plans may require approval for certain services.
- Get the cost in writing when it is a planned procedure. Ask what your copay or coinsurance will be in network versus out of network.
- Check the pharmacy. Confirm that it is in your Part D plan’s network before filling a large or ongoing prescription.
If your plan changes its network midyear or at renewal, the same steps apply again. The plan’s yearly notice of changes is the document to read each fall, and the Medicare enrollment timeline shows when you can act on what you find.
If your plan denies an out-of-network claim
A denial is not always the end. The Centers for Medicare & Medicaid Services (CMS) explains on its Medicare Advantage appeals page that if a plan denies a service or payment, you, your representative or your physician can request a standard or expedited reconsideration within 65 calendar days from the date of the notice of the plan’s decision. If your doctor requests an expedited reconsideration, the plan is required to expedite it, and it must decide as quickly as your health requires.
Keep the denial notice, note the date it was issued, and ask your doctor to describe in writing why the service is medically necessary. If you need free help with an appeal, you can contact Medicare.gov, 1-800-MEDICARE, or your State Health Insurance Assistance Program (SHIP). In Illinois, that program is called SHIP too; in Wisconsin, it is run through the state’s benefit specialist network.
Choosing a plan so network surprises don’t happen
Most out-of-network problems are decided at enrollment. Before you pick a plan, work through these questions:
- Which doctors, hospitals and specialists do you use now? Make a list, including your primary care doctor, any specialists, and the hospital you would go to in an emergency.
- How much do you travel or live elsewhere? Snowbirds and people with family in other states need to look closely at service areas, while Original Medicare with a Medigap policy has no network.
- How much freedom do you want? A PPO gives out-of-network access at a higher price. An HMO usually costs less but asks you to stay in the network.
- What do you take at the pharmacy? Check each drug and pharmacy against the Part D plan.
- Can you absorb the higher out-of-network limit? On a PPO, look at both out-of-pocket maximums, not only the in-network one.
If you want to compare the two main paths side by side, read Medicare Advantage vs. Medicare Supplement.
How Almond Insurance can help
We are a Medicare agency in Rockford, Illinois, serving Northern Illinois and Southern Wisconsin. We compare Medicare Advantage, Medicare Supplement and Part D plans, and we do annual coverage reviews. Our approach is to talk it through in plain language, one conversation at a time, so you understand how each plan treats your doctors, your pharmacy and your travel before you enroll. We are paid by the insurance carriers when you enroll, so you do not pay us for the guidance.
If you are turning 65, retiring, or reviewing the plan you already have, start with our Medicare plan comparison help, or see everything we offer on our services page. Caregivers helping a parent or spouse are welcome too.
FAQ
Does Medicare cover out-of-network doctors?
Original Medicare has no network, so any doctor or hospital that takes Medicare can treat you. Medicare Advantage HMOs generally do not cover non-network care outside emergencies and a few other exceptions. PPOs cover it at a higher cost if the provider agrees to treat you.
Will I get a bill if I go out of network in an emergency?
Emergency care is covered whether or not the provider is in your Medicare Advantage plan’s network, and plans cannot require prior authorization for emergency services. You still owe your plan’s normal emergency cost-sharing, so check your plan’s summary of benefits for the amount.
Does Medicare Advantage cover me when I travel?
It depends on the plan. Emergency and out-of-area urgent care are covered under HMOs, and some plans offer extra benefits for extended travel in the U.S. Other care outside your service area may not be covered, so read your plan documents before you go. Original Medicare works in every state.
What is the difference between out-of-network and not accepting Medicare?
Out-of-network is a private plan term. A doctor who has opted out of Medicare, or who does not accept assignment, is a different matter. A doctor who does not accept assignment can charge up to 15% above the Medicare-approved amount in many cases. A doctor who has opted out may not bill Medicare at all, and a Medicare Advantage PPO will not cover that doctor.
Can I appeal if my plan refuses to pay an out-of-network claim?
Yes. You, your representative or your doctor can request a reconsideration within 65 calendar days of the date on the denial notice. Your doctor can ask for an expedited review when waiting could harm your health.
Sources
- Compare Original Medicare & Medicare Advantage, Medicare.gov
- Does your provider accept Medicare as full payment? Medicare.gov
- Health Maintenance Organizations (HMOs), Medicare.gov
- Understanding Medicare Advantage Plans, Medicare.gov
- Compare types of Medicare Advantage Plans, Medicare.gov
- How to get Medicare services, Medicare.gov
- SHIBA July CE MA HMO & PPO workbook, Washington State Office of the Insurance Commissioner (2024)
- SHIBA July CE Medicare & Medicare Advantage SEPs workbook, Washington State Office of the Insurance Commissioner (2025)
- Reconsideration by the Medicare Advantage (Part C) Health Plan, CMS
- Traveling with Medicare, Medicare Interactive