Medicare Advantage HMO vs. PPO: What’s the Difference?
Reviewed September 30, 2026. The main difference between a Medicare Advantage HMO and a PPO is flexibility. In an HMO, you generally must use doctors and hospitals in the plan’s network (except for emergency or urgent care), you usually choose a primary care doctor, and you need referrals to see specialists. In a PPO, you can go out of network for covered services, usually at a higher cost, and you don’t need referrals.
Quick answer: Choose an HMO if your doctors are in its network and you’re comfortable with referrals in exchange for a more managed plan. Consider a PPO if you want to keep out-of-network doctors, see specialists without referrals, or split time between states. With either one, compare premiums, copays, the drug list and the yearly out-of-pocket limit for your ZIP code.
HMO vs. PPO at a glance
| Question | HMO | PPO |
|---|---|---|
| Can I see any doctor or hospital? | Generally in-network only, except emergency care, urgent care and out-of-area dialysis | Yes, but out-of-network care usually costs more |
| Do I need a primary care doctor? | Usually | No |
| Do I need referrals for specialists? | Yes | No |
| Is drug coverage included? | If you want drug coverage, join an HMO that offers it. You can’t get a separate Medicare drug plan. | If you want drug coverage, join a PPO that offers it. You can’t get a separate Medicare drug plan. |
| Out-of-pocket limit | Yearly limit for in-network services | Yearly limit for in-network services plus a higher combined limit that includes out-of-network services |
Source: Medicare.gov: Compare types of Medicare Advantage Plans.
How a Medicare Advantage HMO works
A Health Maintenance Organization (HMO) plan has a network of doctors, hospitals and other providers. Medicare.gov says that in an HMO “You generally must get your care and services from providers and facilities in the plan’s network (except emergency or urgent care or out-of-area dialysis).” (Medicare.gov: HMO plans)
- Primary care doctor: you usually pick one who coordinates your care.
- Referrals: you need one to see most specialists. Some services, such as a yearly screening mammogram, may not need a referral.
- Out-of-network care: if you see an out-of-network provider for non-emergency care, you may have to pay the full cost.
- Service area: you must live in the plan’s service area, and routine care is expected to happen there.
What is an HMO-POS plan?
Some HMOs include a point-of-service (POS) option. In an HMO-POS plan, Medicare says “you may be able to get some services out of network, but you usually pay more.” It sits between a standard HMO and a PPO, so read which services the POS benefit actually includes.
How a Medicare Advantage PPO works
A Preferred Provider Organization (PPO) plan also has a network, but Medicare.gov explains that “You can generally go to out-of-network providers for covered services, but you’ll usually pay more.” (Medicare.gov: PPO plans)
- No primary care doctor required and no referrals to see specialists.
- Out-of-network coverage: covered services outside the network are paid, but at higher copays or coinsurance.
- Provider participation: an out-of-network doctor must still agree to treat you and accept Medicare, so call before you go.
- Two spending caps: an in-network out-of-pocket limit and a combined limit that counts out-of-network care.
Want an example? Our review of the UnitedHealthcare Medicare Advantage Choice PPO shows how one PPO structures its benefits.
Costs: HMO vs. PPO
Premiums, deductibles and copays are set by each plan and vary by county, so there’s no single answer to which type is cheaper. When you compare plans:
- Keep paying your Part B premium. You still pay it with any Medicare Advantage plan. The standard amount is $202.90 a month in 2026. (CMS)
- Add the plan premium, if there is one.
- Estimate copays for the care you use most: primary care, specialists, labs and imaging, outpatient surgery and hospital stays.
- Check the drug coverage for every prescription you take, including the pharmacy network.
- Look at the worst case: the yearly out-of-pocket maximum, and for a PPO, the combined in- and out-of-network maximum.
Our Medicare plan comparison worksheet walks through each of these line items.
Emergency and urgent care in both plan types
Both HMOs and PPOs cover emergency care anywhere in the U.S., in or out of network. HMOs also cover urgently needed care when you’re outside the plan’s service area. Details: Does Medicare cover emergency room visits? and Does Medicare cover urgent care?
Prior authorization
Both HMOs and PPOs can require prior authorization for services such as advanced imaging, some surgeries, skilled nursing care and certain drugs. A PPO’s freedom to see out-of-network providers doesn’t remove prior authorization rules. For example, many plans require approval before a non-emergency scan, as explained in Does Medicare cover MRIs?
Which is better for you?
An HMO may fit if you:
- Find your current doctors and preferred hospital in the network
- Like having one primary care doctor coordinate your care
- Live in the service area year-round
A PPO may fit if you:
- Want to keep a doctor or specialist who isn’t in any local HMO network
- See several specialists and prefer not to get referrals
- Spend part of the year away from home and want some out-of-network coverage
If you want the widest choice of doctors nationwide, you may also compare Medicare Advantage with Original Medicare plus a Medigap policy. See what Medigap plans cover and how to switch from Medicare Advantage to Medigap.
When you can switch between an HMO and a PPO
- Open Enrollment Period: October 15 to December 7, with the new plan starting January 1.
- Medicare Advantage Open Enrollment Period: January 1 to March 31, if you’re already in a Medicare Advantage plan.
- Special Enrollment Periods: for certain life events, such as moving, losing other coverage, getting Medicaid or getting Extra Help.
Source: Medicare.gov: Joining a plan. Before Open Enrollment, run through our annual Medicare plan review checklist.
Frequently asked questions
What’s the difference between an HMO and a PPO in Medicare Advantage?
An HMO generally limits you to in-network providers (except emergency and urgent care) and requires referrals for specialists. A PPO lets you see out-of-network providers at a higher cost and doesn’t require referrals.
Is an HMO or PPO better for seniors on Medicare?
Neither is better for everyone. The right choice depends on whether your doctors are in network, how often you see specialists, how much you travel and your total yearly costs.
Do Medicare Advantage PPOs cover you in other states?
PPOs cover emergency care anywhere in the U.S. and may cover other out-of-network care outside your area at out-of-network rates, as long as the provider agrees to treat you. Check your plan’s Evidence of Coverage for the details.
Can I add a separate Part D plan to a Medicare Advantage HMO or PPO?
Generally no. Medicare says that if you want drug coverage in an HMO or PPO, you have to join one that offers it, and you can’t get a separate Medicare drug plan.
Do I need a referral in a Medicare Advantage PPO?
No. Medicare lists referrals as not required in PPO plans, though some services may still need prior authorization.
Can I switch from an HMO to a PPO mid-year?
You can switch during the Medicare Advantage Open Enrollment Period (January 1 to March 31) or if you qualify for a Special Enrollment Period. Otherwise, changes happen during Open Enrollment each fall.
This article is general information, not individual insurance advice. Medicare365 is not affiliated with or endorsed by the U.S. government or the federal Medicare program. Plan availability and benefits vary by location.