What Is Medicare Advantage?
Medicare Advantage (Part C) is an alternative way to receive your Medicare benefits through a private insurance company that has contracted with Medicare. Instead of Original Medicare (Parts A and B) paying your providers directly, you enroll in a private plan that manages your benefits.
By law, Medicare Advantage plans must cover everything Original Medicare covers (except hospice care, which remains covered by Original Medicare). Most plans also bundle in Part D prescription drug coverage (called MAPD plans) and many offer extra benefits not available in Original Medicare, such as routine dental, vision, and hearing coverage.
Medicare pays the private insurer a fixed monthly amount per enrollee. In exchange, the plan manages your care and pays your providers. You continue paying your Part B premium ($185/month in 2025) and may pay an additional plan premium (often $0).
Medicare Advantage Plan Types
HMO — Health Maintenance Organization
The most common type. You must use doctors and hospitals within the plan's network (except in emergencies). You typically need a primary care physician (PCP) who coordinates your care and provides referrals to specialists. HMO plans generally have the lowest premiums but the least flexibility. HMO-POS plans add limited out-of-network access.
PPO — Preferred Provider Organization
More flexibility than HMO. You can see any Medicare-accepting provider in or out of network — but you pay less when staying in-network. No referrals required. PPO plans typically have higher premiums than HMO plans.
PFFS — Private Fee-for-Service
The plan sets the payment terms for providers. You can see any Medicare-eligible provider who agrees to accept the plan's terms. Some PFFS plans have networks; others don't. Less common than HMO/PPO.
SNP — Special Needs Plans
Tailored for specific groups: people with certain chronic conditions (C-SNP), people eligible for both Medicare and Medicaid (D-SNP), or people living in institutions like nursing homes (I-SNP). SNPs must provide targeted benefits and care coordination for their specific population.
What Medicare Advantage Plans Include
Required Coverage
- All Part A (hospital) benefits
- All Part B (medical) benefits
- Emergency and urgently needed care
- Hospice (through Original Medicare)
- Annual out-of-pocket maximum cap
Common Extra Benefits
- Part D prescription drug coverage
- Routine dental (cleanings, X-rays, sometimes major)
- Vision exams & allowance for glasses/contacts
- Hearing exams & hearing aid allowance
- Fitness membership (SilverSneakers or similar)
- Over-the-counter (OTC) allowance
- Transportation to medical appointments
- Telehealth visits
Medicare Advantage vs. Original Medicare + Medigap
| Feature | Original Medicare + Medigap + Part D | Medicare Advantage (Part C) |
|---|---|---|
| Monthly cost (est.) | $185 (Part B) + ~$150 Medigap + ~$40 Part D = ~$375+ | $185 (Part B) + often $0 plan premium |
| Provider freedom | Any Medicare provider nationwide | Network-limited (HMO) or preferred network (PPO) |
| Referrals needed | No | Often yes for HMO; no for PPO |
| Out-of-pocket cap | Via Medigap plan | Built-in by law ($9,350 in-network, 2025) |
| Dental/Vision/Hearing | Not included | Often included |
| Prescription coverage | Separate Part D plan | Usually bundled (MAPD) |
| Prior authorization | Rarely required | Often required for certain services |
| Plan changes annually | Stable (Medigap rates may change) | Benefits, network, formulary can change each year |
| Travel coverage | Nationwide Medicare providers | Emergency only outside service area |
| Can add Medigap | Yes | No |
Medicare Advantage Costs
While many Medicare Advantage plans advertise $0 monthly premiums, you still pay your Part B premium ($185/month in 2025). Plan costs vary significantly:
- Premium: Often $0 beyond Part B premium, though some plans charge more
- Deductible: Varies by plan — some have $0, others have deductibles for medical or drug coverage
- Copays/coinsurance: You pay set amounts per visit or service (e.g., $5–$40 for primary care, $40–$80 for specialists)
- Out-of-pocket maximum: By law, the maximum in-network OOP for non-PFFS plans cannot exceed $9,350 in 2025. Many plans have lower limits.
How to Evaluate a Medicare Advantage Plan
- Check your doctors are in-network — If you have preferred doctors or specialists, verify they participate in the plan before enrolling.
- Check your prescriptions are covered — Review the plan's drug formulary for your specific medications and their tier placement.
- Estimate total annual costs — Use Medicare.gov's Plan Finder to estimate your total out-of-pocket costs based on your health usage.
- Review the star rating — CMS rates plans 1–5 stars for quality. 4-5 star plans generally perform better for member satisfaction and care coordination.
- Read the Evidence of Coverage (EOC) — This document details exactly what is and isn't covered, all costs, and the rules for getting care.
- Consider prior authorization requirements — Some plans require advance approval for specialist visits, surgeries, or certain drugs.
Medicare Advantage Enrollment Periods
| Period | Dates | What You Can Do |
|---|---|---|
| Initial Enrollment Period (IEP) | 7 months around 65th birthday | Enroll in any Medicare Advantage plan |
| Annual Open Enrollment (OEP) | Oct 15 – Dec 7 | Switch MA plans, switch to Original Medicare, change Part D |
| MA Open Enrollment (MA-OEP) | Jan 1 – Mar 31 | Switch from one MA plan to another, or drop MA for Original Medicare |
| Special Enrollment Period (SEP) | Triggered by qualifying events | Move out of service area, plan loses Medicare contract, qualify for Extra Help, etc. |
Risks to Be Aware Of
- Networks change annually — Your doctor may leave the network next year even if they're in it now.
- Prior authorization can delay or deny care — Plans can require advance approval for some services, which Original Medicare generally doesn't.
- Plan benefits change each year — Extra benefits, premiums, copays, and formularies can change on January 1.
- Switching back to Original Medicare may be difficult — If you're past your Medigap open enrollment window, insurers may deny coverage or charge more due to health history.
- Out-of-network costs can be high — PPO out-of-network costs or HMO emergency situations can result in significant bills.