Medicare Advantage HMO vs PPO: What’s the Real Difference in 2027?

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Once you’ve decided on Medicare Advantage, a second decision arrives almost immediately: HMO or PPO? Every large carrier sells both. The letters matter more than people expect, because they decide how freely you can choose doctors and — more importantly — how much a bad year can cost you. Here is what actually separates them in 2026, with the real numbers rather than the usual generalities.

The Quick Answer

• HMO: lower premiums, a much lower out-of-pocket ceiling, but you stay inside the network and usually need a referral to see a specialist
• PPO: no referrals, out-of-network care is covered at a higher cost share, and there are two out-of-pocket ceilings instead of one
• The premium difference between them is smaller than most people assume. The difference in worst-case exposure is much larger

How HMO Plans Work

An HMO builds your coverage around one defined network. You generally choose a primary care physician who coordinates your care and refers you on to specialists, and care outside the network usually isn’t covered at all except for genuine emergencies and urgent care.

That restriction is what buys the lower price, and the savings show up less in the premium than in the ceiling. HMOs are also the most common structure by a wide margin: they account for 57% of all Medicare Advantage plans offered in 2026.

An HMO fits when your doctors already sit inside one system and you don’t mind the referral step. It fits badly when your care is split across two hospital systems, because a network that excludes one of them isn’t a discount, it’s a wall.

How PPO Plans Work

A PPO trades some of those savings for freedom. No referral is needed to see a specialist, and out-of-network providers are covered — at a higher cost share, but covered, which is the part HMOs don’t offer.

PPOs have been gaining ground steadily: local PPOs now make up 42% of plans offered, up from 24% in 2017, while regional PPOs have shrunk to around 1%. If you last chose a plan several years ago, the market has moved under you.

They suit people who travel, split the year between two states, or whose care already involves more than one health system.

The second ceiling nobody mentions

This is the single most important structural difference, and it’s usually reduced to a footnote.

An HMO has one out-of-pocket maximum. A PPO has two: an in-network limit, and a higher combined limit that applies once out-of-network spending is counted. Federal rules for 2026 allow a plan’s out-of-pocket limit to reach $9,250 for in-network services and $13,900 for in-network and out-of-network combined.

So the flexibility a PPO sells you is real, and so is its price. Using out-of-network care doesn’t just cost more per visit — it moves you onto a different, higher ceiling. The freedom is worth having; it is worth knowing what the worst version of it costs before you rely on it.

The Numbers, Side by Side

	HMO	PPO
Referral needed for specialists	Usually yes	No
Out-of-network coverage	Emergency and urgent care only	Covered at a higher cost share
Average premium, 2026	$12/month	$18/month (local PPOs)
Average in-network out-of-pocket limit	$4,636	$6,592
Average combined limit	Not applicable	$9,825
Share of plans offered in 2026	57%	42% local, 1% regional
Suits	Care concentrated in one network	Travel, or care across several systems

Those averages, from KFF’s analysis of 2026 plans, reframe the decision considerably, and our own count of the 2027 plan file puts the premium gap at $11.15 a month and the exposure gap at $1,450.

The premium gap is $6 a month — $72 a year. That is not the trade-off most articles describe, and on its own it would be a weak reason to choose either.

The gap that matters is underneath it. The average HMO caps your in-network exposure at $4,636; the average PPO at $6,592, and at $9,825 once out-of-network care counts. That’s a difference of nearly $5,200 in a bad year, bought for $72 in premium.

Neither number tells you which to choose. But it does tell you where to look: not at the monthly price, which barely moves, but at what each plan does to you in the year you get seriously ill. And since averages are not offers, the only limits that matter are the ones printed on the specific plans in your county.

What the 2027 Plan Files Add

The averages above are KFF’s for 2026. For 2027 we counted the plans ourselves, from the CMS plan file and the benefit filings every plan submits, keeping only the HMOs and PPOs open to anyone (no special needs or employer plans). The full cost breakdown, county by county, is in our separate analysis of what HMOs and PPOs actually cost in 2027; here are the rows that matter most when you are choosing between the two.

Ordinary plans, 2027	HMO	PPO
Plans on sale	2,115	1,426
Plans with no Part C premium	72.5%	56.3%
Average Part C premium	$20.74	$31.89
Median in-network out-of-pocket limit	$5,700	$7,150
Median drug deductible (plans with drug coverage)	$500	$685
Drug deductible at the $700 maximum	27.3%	49.9%
Over-the-counter allowance	64.7%	49.0%
Transportation to medical appointments	28.1%	5.6%
Meal benefit	50.7%	36.5%
Typical eyewear allowance per year	$200	$150

Our own count from the CMS CY2027 Landscape file and PBP Benefits 2027 file. HMO includes HMO-POS; PPO includes local and regional PPOs. “Typical” is the median among plans that file a dollar amount.

The 2027 numbers make the trade-off sharper than the 2026 averages did. The PPO’s freedom now costs you in four places at once: a higher monthly premium on average, a ceiling about $1,450 higher at the median, a drug deductible that is at the $700 maximum on half of PPOs, and fewer extras — the gap on transportation is the widest, with HMOs more than five times as likely to include it. Against all that sits the one thing an HMO can’t give you: coverage outside the network, without a referral.

None of these are reasons to choose an HMO if your doctors are split across systems or you live part of the year elsewhere. They are reasons to price the PPO properly: compare its out-of-pocket limit and drug deductible, not just its premium, against the HMOs that do include your doctors.

What’s Identical Either Way

Both types must cover everything Original Medicare Part A and Part B cover, and both must include a hard annual out-of-pocket maximum — protection Original Medicare doesn’t provide on its own. Most plans of both types bundle in Part D drug coverage, and either way you keep paying your standard Part B premium.

One limit on that protection is worth being precise about, because people rely on it wrongly: the out-of-pocket maximum covers Part A and Part B cost sharing only. It does not include your premiums, your prescription drug costs — those have their own separate annual cap — or dental, vision and other benefits that sit outside standard Medicare. Hitting your out-of-pocket maximum does not mean your spending stops.

Choosing Between Them

Start with your doctors, not with the plan type. Write down everyone you actually see — primary care, every specialist, your preferred hospital — and check each one against the specific plans available where you live. If they all sit inside one HMO network, the HMO’s lower ceiling is a real advantage and the referral requirement is a minor inconvenience. If even one of them falls outside, the question answers itself.

Then consider geography. If you spend months of the year in another state, a network built around your home county is of limited use, and a PPO’s out-of-network coverage stops being a theoretical benefit.

Only then look at price — and when you do, compare the out-of-pocket limits with as much attention as the premiums. The premium is what you pay when nothing goes wrong. The limit is what you pay when something does.

Before You Renew in 2026

The choice of plans got smaller this year. KFF counts 3,373 Medicare Advantage plans available for individual enrollment in 2026, a 9% decrease — 346 fewer plans than in 2025. For the average beneficiary that’s 39 options rather than 42.

Three fewer choices is not a crisis. A withdrawn plan is a different matter for the person who was enrolled in it, and a plan that stayed can still have changed its network. Read your Annual Notice of Change when it arrives in September, and check your own doctors against the coming year’s network rather than assuming last year’s answer still holds.

Frequently Asked Questions

Is a PPO much more expensive than an HMO? On premium, no — the 2026 averages are $12 a month for HMOs and $18 for local PPOs. The meaningful difference is in the out-of-pocket ceiling, where the averages are $4,636 and $6,592 in network, and $9,825 for a PPO once out-of-network care is included.

Can I switch from HMO to PPO later? Yes, during the Annual Enrollment Period (October 15 – December 7), or once during the Medicare Advantage Open Enrollment Period (January 1 – March 31) if you’re already in a Medicare Advantage plan.

Does the out-of-pocket maximum include my premium? No. It covers Part A and Part B cost sharing — copays, coinsurance and deductibles. Premiums and prescription drug costs sit outside it, and drugs have their own separate annual cap.

What happens if I need care while traveling? An HMO typically covers only emergency and urgent care outside its service area. A PPO generally offers broader out-of-network coverage — but remember that using it moves you toward the higher combined limit rather than the in-network one.

Do HMO and PPO plans cost the same for prescriptions? Not necessarily. Formularies and drug cost sharing are set plan by plan, not by plan type. Check your own medications against the specific plan’s formulary.

Do PPOs include fewer extra benefits than HMOs? For 2027, on average, yes. In our count of the CMS benefit filings, 49.0% of ordinary PPOs include an over-the-counter allowance against 64.7% of HMOs, and only 5.6% of PPOs pay for rides to medical appointments against 28.1% of HMOs. Hearing aids and eyewear are close to universal on both.

Bottom Line

HMO versus PPO isn’t a question of which is better. It’s a question of where you want your risk.

On average the two are separated by about $6 a month in premium and about $1,950 in in-network out-of-pocket ceiling — and roughly $5,200 once a PPO’s combined limit is in play. The premium is close to irrelevant to the decision. The ceiling is the decision.

Work out whether your doctors fit in one network. If they do, the HMO’s lower ceiling is worth having. If they don’t, or if you spend part of the year elsewhere, the PPO’s flexibility is what you’re paying for — and now you know what it costs when you use it.

Compare the exact plans available in your ZIP code with the official Medicare Plan Finder, or speak with your local State Health Insurance Assistance Program (SHIP) for free, unbiased guidance.

Update history

• September 2, 2026 — First published with KFF’s 2026 figures.
• October 18, 2026 — Added our own 2027 count of HMOs and PPOs from the CMS plan and benefit files (premiums, out-of-pocket limits, drug deductibles and extra benefits), a related question, and US spelling. The 2026 KFF figures are unchanged and labeled as 2026.

Sources

• Medicare Advantage in 2026: Premiums, Out-of-Pocket Limits, Supplemental Benefits and Prior Authorization — KFF. Source for the $9,250 in-network and $13,900 combined statutory limits, the $4,636 HMO and $6,592 PPO average in-network out-of-pocket limits, the $9,825 average combined PPO limit, and the $12 and $18 average monthly premiums.
• Medicare Advantage 2026 Spotlight: A First Look at Plan Offerings — KFF. Source for the 3,373 plans available and the 9% decrease of 346 plans, the 39 versus 42 average options, the 57% HMO share, and the local PPO share rising from 24% in 2017 to 42% in 2026 with regional PPOs at 1%.

All figures on this page were checked against the sources above on September 16, 2026. The 2027 table is our own count from the CMS files, made on October 17–18, 2026.

Disclaimer: Figures mentioned in this article, including out-of-pocket maximums and premium averages, reflect 2026 data from the Centers for Medicare & Medicaid Services (CMS) and KFF analysis, and vary by carrier, plan and county. Always confirm current details directly with Medicare.gov, 1-800-MEDICARE, or a licensed agent before making a decision.