Updated July 2026 · Reviewed by the CoverageCo team
Medicare Advantage (Part C) is a way to receive your Part A and Part B benefits through a private insurance plan approved by Medicare, usually with drug coverage and extras bundled in. You keep paying your Part B premium, and you generally use the plan's provider network. It replaces how you get Medicare, not what Medicare covers.
Key takeaways
- Advantage plans must cover everything Original Medicare covers — they change delivery, not the core entitlement.
- You still pay your Part B premium while enrolled in an Advantage plan.
- Plans use networks, and some services require prior authorization.
- Every Advantage plan has an annual out-of-pocket maximum, which Original Medicare alone does not.
How Part C actually works
When you enroll in a Medicare Advantage plan, a private insurer approved by Medicare takes over administering your benefits. You're still in the Medicare program, but the plan pays your claims instead of Original Medicare paying them directly.
By law, an Advantage plan has to cover everything Original Medicare covers. What differs is how you access that care — which providers, under what rules, at what cost when you actually use it.
Most Advantage plans bundle in Part D drug coverage, and many add benefits Original Medicare doesn't include at all, like routine dental, vision, hearing, or fitness memberships.
What the plan types mean
Advantage plans come in a few structures, and the difference matters more than the marketing does:
| Type | How networks work | Referrals |
|---|---|---|
| HMO | In-network only, except emergencies | Usually required for specialists |
| PPO | In and out of network, out costs more | Usually not required |
| SNP | Built for a specific group (e.g. certain conditions or dual eligibility) | Varies by plan |
| PFFS | Any provider who agrees to the plan's terms | Usually not required |
The one number people skip
Every Medicare Advantage plan is required to have an annual out-of-pocket maximum. That's a genuine advantage over Original Medicare on its own, which has no cap at all.
But read the actual number rather than being reassured by the concept. Maximums vary widely between plans, and some are substantial. A plan with a $0 monthly premium and a high out-of-pocket maximum is making a specific trade on your behalf — one that's fine in a healthy year and expensive in a bad one.
Where the extras are real and where they're thin
Dental, vision, and hearing benefits are genuine and, for some people, the deciding factor. They're also usually capped annually, and the caps rarely make it into the advertisement.
A dental benefit may comfortably cover cleanings and x-rays while covering very little of a crown, implant, or denture. Before you let extras decide the plan, find the annual limit and check it against the work you actually expect to need.
Is Medicare Advantage right for you?
It tends to suit people who are comfortable within a network, want lower monthly costs, value the bundled extras, and don't travel extensively or split time between states.
It tends to suit people less well when they have doctors they won't give up, a serious ongoing condition, or a strong preference for predictable costs over lower premiums.
The only way to know is to check your specific doctors, prescriptions, and pharmacy against the plans offered in your county. A licensed agent can run that comparison at no cost.
Common questions
Is Medicare Advantage free?
Many plans advertise a $0 monthly plan premium, but you still pay your Part B premium, plus copays and coinsurance when you use care. "$0 premium" describes the plan's own charge, not your total cost of coverage.
Do I keep Original Medicare if I join an Advantage plan?
You remain in the Medicare program, but your benefits are administered by the private plan rather than paid directly by Original Medicare. You continue paying your Part B premium.
Can I see any doctor with Medicare Advantage?
Generally no. Most Advantage plans use provider networks. HMOs typically cover in-network care only except in emergencies, while PPOs cover out-of-network care at a higher cost.
Does Medicare Advantage include prescription coverage?
Most plans include Part D drug coverage, but not all. If you enroll in an Advantage plan without drug coverage, check carefully before adding a separate Part D plan — the rules differ by plan type.