HMO vs. PPO Medicare Advantage plans: which fits you in 2027?

Yes, an HMO is a type of Medicare Advantage plan. HMO stands for Health Maintenance Organization. It asks two things of you. You get your care from doctors and hospitals in the plan's network. And you usually pick a primary care doctor, who sends you to specialists with a referral.

In return, HMOs tend to have lower premiums. If your doctors are in the network and referrals do not bother you, an HMO can give you good coverage at a low monthly cost. The catch comes when you want to see a doctor outside the network. Most of the time, the plan will not pay.

Here is the good news. Emergency and urgent care are covered anywhere, even out of network and out of your service area. So an HMO does not leave you stuck when you travel. There is also a looser kind of HMO, called an HMO-POS (point of service). It covers some care out of network, at a higher cost.

For more on how HMOs work, see Medicare HMO plans.

A PPO (Preferred Provider Organization) loosens both rules. You do not need a referral to see a specialist. You do not have to pick a primary care doctor. And you can go out of network and still get some coverage. You just pay a bigger share of the bill.

You pay for that freedom. PPO premiums tend to be higher than HMO premiums. If you travel, live in two places, or want to keep a doctor who is not in the network, the extra cost may be worth it.

Two things to know. First, the doctor must take Medicare, and an out-of-network visit costs you more. Call the plan before you go, so you know the care is covered. Second, PPOs come in local and regional types. A regional PPO covers a whole state or a group of states, which can help if you cross state lines a lot. For the full picture, see what a Medicare PPO is.

Neither type is better for everyone. An HMO is not a worse plan. It is a tighter plan that tends to cost less. A PPO is not a better plan. It is a looser plan that tends to cost more. Here is the trade, side by side.

Every Medicare Advantage plan, HMO or PPO, has a yearly cap on what you pay for covered care. It is called the maximum out-of-pocket limit, or MOOP. Once you reach it, the plan pays 100% of covered care for the rest of the year. Original Medicare has no cap like this. With Original Medicare alone, your 20% share of Part B costs has no yearly limit.

For 2027, CMS set the highest in-network cap a plan can use at $9,850. That is up from $9,250 in 2026. Plans can set a lower cap, and many do.

PPOs have a second cap. It covers in-network and out-of-network care added together. For 2027, that combined cap can be no higher than $14,800, up from $13,900 in 2026. An HMO has only the in-network cap, because it does not cover routine care out of network.

Most people are in plans with caps well below the top. KFF found that in 2026, the average in-network cap was $5,421. Look up the cap for each plan you are thinking about. It is listed in the plan details.

Drugs have their own cap. If your plan includes Part D drug coverage, the most you pay for covered drugs in 2027 is $2,400. You also keep paying your Part B premium on top of any plan premium.

This surprises people on HMOs and PPOs alike. Many services need prior authorization. That means the plan must approve the care before it agrees to pay. This often comes up for costly care, like advanced scans, some surgeries, or a stay in a skilled nursing facility.

In a quiet year, you may never notice it. In a hard year, it can mean a wait, or a denial your doctor has to appeal. Under a CMS rule called CMS-0057-F, which started in 2026, a plan must decide a standard request within 7 calendar days. An urgent request must be decided within 72 hours. If the plan says no, it must give a specific reason.

Medicare also sets a few rules that protect you on both plan types:

• Once a plan approves a course of treatment, the approval lasts as long as you medically need it.
• If you switch plans in the middle of treatment, the new plan must give you at least 90 days before it asks for a new approval.
• The plan cannot charge you more than Original Medicare would for chemotherapy, dialysis, or skilled nursing facility care.

If you never want to deal with prior authorization, that is a point for Original Medicare with a Medigap plan. See Medigap vs. Medicare Advantage.

The most common mistake is joining a plan and then finding out a key doctor is not in it. It takes three steps to avoid that. Do them for each doctor and each hospital you care about.

The choice is less about the letters and more about three things in your own life: your doctors, how you feel about referrals, and how much you travel. Match those against the real plans in your area before you sign up.

Open Enrollment runs October 15 to December 7. You can join, drop, or switch Medicare Advantage plans, including moving from an HMO to a PPO or back. The plan must get your request by December 7. Your new plan starts January 1.

The Medicare Advantage Open Enrollment Period runs January 1 to March 31. It is only for people already in a Medicare Advantage plan. You can switch to a different Medicare Advantage plan, or go back to Original Medicare and join a drug plan. The change starts the first of the next month.

For every window and the special rules, see Medicare enrollment periods.

Is an HMO a type of Medicare Advantage plan? Yes. HMO and PPO are the two most common kinds of Medicare Advantage plans. Medicare also lists Special Needs Plans, Private Fee-for-Service plans, and Medical Savings Account plans.

Which is better, a PPO or an HMO? Neither one is better for everyone. An HMO usually costs less but keeps you in network. A PPO costs more but lets you go out of network. Pick the one that fits your doctors and how you live.

Why do some people say not to get a Medicare Advantage plan? Most of the worry comes from a few real trade-offs. You may need prior authorization. Networks and costs can change each year. And if you leave Medicare Advantage later, a Medigap insurer may charge you more or say no, based on your health, unless you have a special right to buy. Those are reasons to compare with care, not reasons every plan is wrong for you.

HMOs and PPOs cover most of the market. You may also see a PFFS (Private Fee-for-Service) plan or an MSA (Medical Savings Account) plan. A PFFS plan sets its own payment terms, and you can see any provider who agrees to them. An MSA pairs a high-deductible plan with a savings account that Medicare puts money into. They are less common. For most people, the real choice is HMO or PPO.