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Medicare Advantage HMO vs PPO: what is the difference?

Published by MedicareQuotesForYou. Published . Last reviewed .

Short answer

An HMO pays only for care from doctors and hospitals inside its network. A PPO pays for out-of-network care too, but at a higher cost share. Both are types of Medicare Advantage plan, both must cover everything Original Medicare covers, and both cover emergency and urgently needed care anywhere in the United States regardless of network.

The everyday differences are referrals and flexibility. An HMO usually asks you to name a primary care doctor and to get a referral before seeing a specialist. A PPO usually does neither. In exchange, HMOs typically carry lower premiums and lower copays.

The difference that costs the most money is the second out-of-pocket maximum. In 2026 a Medicare Advantage plan's in-network out-of-pocket maximum cannot exceed $9,250. On a PPO, care received out of network runs against a separate combined limit that can be as high as $13,900. A PPO does not remove your financial exposure — it raises the ceiling in return for wider access.

Side by side

Medicare Advantage HMO and PPO compared. 2026 federal maximums shown; individual plans often set lower limits.
HMOPPO
Out-of-network care Not covered, apart from emergency care, urgently needed care and out-of-area dialysis. You pay the full bill otherwise. Covered, at a higher cost share than in-network care.
Primary care doctor required Usually yes. Usually no.
Referral to see a specialist Usually required. Usually not required.
Premium Often $0, and generally the lower of the two. Often higher than a comparable HMO in the same area.
Copays and coinsurance Generally lower. Generally higher, and higher again out of network.
Out-of-pocket maximum One limit, for in-network care. Cannot exceed $9,250 in 2026. Two limits: an in-network limit capped at $9,250, and a combined in-network plus out-of-network limit that can reach $13,900.
Prior authorization Common for higher-cost services. Also common. A PPO does not exempt you from it.
Prescription drug coverage Usually included. Usually included, but a few PPOs do not include it.
Travel within the U.S. Routine care away from your service area is generally not covered. Routine care from any provider willing to bill the plan is generally covered at the out-of-network rate.
The out-of-network catch on a PPO A Medicare Advantage PPO covers out-of-network care, but that is not the same as Original Medicare's guarantee. Under Original Medicare, any provider who participates in Medicare must accept you. Under a PPO, a provider who has no contract with the plan can simply decline to see you or to bill the plan — and many specialist practices do exactly that. "Out-of-network coverage" describes what the plan will pay if a provider agrees to treat you. It does not oblige the provider to agree. Before assuming a PPO gives you access to a particular doctor or hospital, ask that office directly whether they accept that specific plan.

What the two out-of-pocket maximums actually mean

Every Medicare Advantage plan must cap what you can spend on Part A and Part B services in a year. That cap is the most important number on a plan, because it is your worst case. HMOs have one. PPOs have two, and the distinction matters:

  • The in-network maximum applies to care from contracted providers. In 2026 the federal ceiling is $9,250, and most plans set theirs well below it — published analyses of 2026 plan filings put the enrollment-weighted average nearer $5,400.
  • The combined maximum applies to in-network and out-of-network care added together, and in 2026 can be as high as $13,900. A year in which you use significant out-of-network care is measured against this larger figure, not the in-network one.

Neither figure includes your Part B premium, the plan's own premium, or your prescription drug costs. Drug spending runs against a separate cap — $2,100 in 2026 — so in a bad year you can be exposed to both limits at once. Our page on what Medicare costs per month sets out how these pieces fit together.

Things that are the same on both

A good deal of what people expect to differ does not:

  • Both must cover everything Original Medicare covers. Neither plan type can offer less than Parts A and B.
  • Both cover emergency and urgently needed care anywhere in the U.S. at in-network cost sharing, network rules notwithstanding. An HMO does not leave you uncovered in an emergency out of state.
  • Both use prior authorization. Choosing a PPO does not mean the plan stops reviewing whether a service is covered before it is provided.
  • Both can change their network, formulary, copays and extra benefits every January 1, with notice in the Annual Notice of Change each September.
  • Both replace Original Medicare for the purposes of how your claims are paid, and neither can be combined with a Medigap policy. See Medicare Advantage vs Medigap.
  • Neither generally covers routine care outside the United States, though some plans add a limited worldwide emergency benefit.

The other plan types you may see

HMO and PPO are the two common ones, but they are not the only Medicare Advantage designs:

  • HMO-POS — an HMO with a point-of-service option, which allows out-of-network coverage for certain named services, often dental or specialist care, rather than across the board. Read which services are included, because the answer differs by plan.
  • PFFS (Private Fee-for-Service) — you may use any Medicare provider who agrees to the plan's terms of payment, and providers decide visit by visit. Uncommon now.
  • SNP (Special Needs Plan) — restricted to people who meet a defined condition: having both Medicare and Medicaid, living in an institution, or having a specific chronic illness. These are usually built on an HMO structure and often have richer benefits for those who qualify.
  • MSA (Medical Savings Account) — a high-deductible plan paired with a deposit into a savings account. Rare, and it does not include drug coverage.

Which one fits which situation

There is no better plan type in the abstract; there is one that matches how you actually use care.

  • An HMO tends to suit you if the doctors and hospital you already use are in the network, you are content to work through a primary care doctor, you spend most of the year in one place, and you want the lowest predictable costs.
  • A PPO tends to suit you if you see specialists directly and do not want referrals, you split the year between two states, you are managing a condition at a centre that may sit outside a local network, or a doctor you will not change is out of network.
  • Neither may suit you if what you actually want is unrestricted access to any Medicare provider in the country with no network at all and no prior authorisation. That is Original Medicare, usually paired with a Medigap policy — a different trade-off, with its own timing rules that are easy to miss. Our Advantage vs Original Medicare comparison covers it.

How to check before you enroll

  1. List your doctors and check each one by name against the specific plan, on the plan's own directory, then confirm with the practice. Directories are frequently out of date, and the practice's answer is the one that counts.
  2. If you are considering a PPO for a particular out-of-network doctor, ring that office and ask whether they will bill that plan. This single call is the most useful thing you can do, and almost nobody makes it.
  3. Enter every prescription and dose to see the tier and copay. Formularies vary between plans from the same insurer.
  4. Write down both out-of-pocket maximums on any PPO you are comparing, not just the in-network one.
  5. Check what needs prior authorisation if you have a planned procedure, an ongoing infusion or regular imaging.

Frequently asked questions

What is the difference between a Medicare Advantage HMO and a PPO?

An HMO covers care only from providers in its network, apart from emergency care, urgently needed care and out-of-area dialysis. A PPO also covers out-of-network care, at a higher cost share and against a separate, higher out-of-pocket maximum. HMOs usually require a primary care doctor and referrals to specialists; PPOs usually do not. HMOs generally cost less in premium and copays.

Is a Medicare PPO better than an HMO?

Neither is better in general — they suit different circumstances. A PPO gives more freedom to see providers outside the network and usually avoids referrals, at a higher premium and higher cost sharing. An HMO costs less and is well suited to someone whose doctors are already in network and who stays in one area. The right choice depends on which providers you use and whether you travel.

Do I need a referral with a Medicare Advantage PPO?

Usually not. Most Medicare Advantage PPOs let you see a specialist directly without a referral from a primary care doctor. This is one of the main practical differences from an HMO. Prior authorisation for particular services can still apply, which is a separate requirement from a referral.

Can I see any doctor with a Medicare Advantage PPO?

Not automatically. The plan will pay toward out-of-network care, but a provider with no contract with the plan can decline to treat you or to bill the plan, and some specialist practices do. Out-of-network coverage describes what the plan pays if the provider agrees; it does not require the provider to agree. Confirm with the practice before enrolling on that basis.

What is the maximum out-of-pocket for a Medicare Advantage plan in 2026?

The mandatory in-network limit is $9,250 for 2026, and plans may set lower limits. For plans covering out-of-network care, mainly PPOs, there is a separate combined in-network and out-of-network limit that can be as high as $13,900. Neither includes premiums or prescription drug costs; Part D spending has its own separate cap of $2,100 in 2026.

Does an HMO cover me if I have an emergency while travelling in the U.S.?

Yes. Every Medicare Advantage plan, HMO included, must cover emergency and urgently needed care anywhere in the United States at in-network cost sharing, regardless of the network. What an HMO generally does not cover is routine or planned care outside its service area, so it is a poor fit for someone who spends months of the year in another state.

Does a PPO have prior authorization?

Yes. Prior authorisation is used by both HMOs and PPOs, typically for higher-cost services such as imaging, surgery, skilled nursing care and some drugs. Choosing a PPO gives you more freedom over which provider you see; it does not remove the plan's review of whether a service will be covered.

Can I switch from an HMO to a PPO?

Yes, during the Annual Enrollment Period from October 15 to December 7, with the change effective January 1. If you are already in a Medicare Advantage plan you may also make one change between January 1 and March 31. Outside those windows you need a Special Enrollment Period. Dissatisfaction with a plan, or a doctor leaving its network mid-year, does not by itself create one.

Check which plan type fits your doctors

The choice between an HMO and a PPO comes down to who you see and where. Tell us a little about yourself and a licensed insurance agent can check your doctors and prescriptions against the HMO and PPO plans available where you live. There is no cost and no obligation.

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