Medicare Advantage vs Medigap: Which is Right for You?
- Medicare Advantage (Part C) bundles your hospital and medical coverage into one plan, often with extra benefits like dental and vision, but typically requires you to use network providers.
- Medigap (Medicare Supplement) works alongside Original Medicare to cover gaps like copays and deductibles, giving you freedom to see any Medicare-accepting doctor nationwide.
- Cost structures differ significantly: Medicare Advantage usually has lower monthly premiums but higher out-of-pocket costs when you need care; Medigap has higher premiums but more predictable expenses.
- Network restrictions are the biggest trade-off: Medicare Advantage limits you to specific doctors and hospitals (except emergencies), while Medigap offers freedom from network restrictions (subject to providers accepting Medicare assignment).
- Your health status and finances matter: Medicare Advantage works well if you're healthy and budget-conscious; Medigap is better if you have chronic conditions, travel frequently, or prefer cost predictability.
Choosing between Medicare Advantage and Medigap is one of the most important healthcare decisions you'll make as a Medicare beneficiary. Both options aim to enhance your Medicare coverage, but they work in fundamentally different ways — and the right choice depends on your unique health needs, budget, and lifestyle.
Understanding the Basics
What is Medicare Advantage?
Medicare Advantage (also called Medicare Part C) is an all-in-one alternative to Original Medicare. Private insurance companies approved by Medicare offer these plans, which must cover everything Original Medicare covers — but often include extra benefits like dental, vision, hearing, and even gym memberships.
When you enroll in Medicare Advantage, you're essentially letting a private insurer manage your Medicare benefits. You'll still have Medicare, but the private company controls how you access your care.
What is Medigap?
Medigap (Medicare Supplement Insurance) is supplemental coverage that works alongside Original Medicare. These standardized plans, sold by private insurers, help pay the out-of-pocket costs that Original Medicare doesn't cover — like copayments, coinsurance, and deductibles.
Think of Medigap as a financial safety net. You keep Original Medicare as your primary coverage, and Medigap fills in the gaps.
How They Work: The Core Difference
The fundamental difference comes down to how you receive care:
With Medicare Advantage, your plan becomes your primary coverage. You typically need to use doctors and hospitals in the plan's network (except in emergencies). The insurance company decides which providers you can see and may require referrals or prior authorizations for certain services.
With Medigap, you keep Original Medicare as your primary coverage and can see any doctor or hospital in the United States that accepts Medicare — no networks, no referrals needed. Medigap simply pays its share of your bills after Medicare pays its part.
Cost Comparison: Monthly Premiums vs Out-of-Pocket Expenses
Medicare Advantage Costs
Medicare Advantage plans often advertise low or even $0 monthly premiums, which sounds attractive. However, there's more to the cost picture:
- Monthly Premium: Often $0–50/month (you still pay your Part B premium to Medicare)
- Deductibles: Vary by plan; some plans have no deductible, others may be $500+
- Copays/Coinsurance: You'll pay these each time you use services (doctor visits, hospital stays, tests)
- Maximum Out-of-Pocket (MOOP): All plans have an annual cap on your costs, typically $3,000–8,000
- Network Restrictions: Going out-of-network usually costs significantly more
The tradeoff here is clear: lower monthly costs but potentially higher bills when you actually need healthcare.
Medigap Costs
Medigap premiums are typically higher, but they provide more predictable healthcare spending:
- Monthly Premium: Usually $100–300+/month depending on your plan, age, location, and tobacco use
- Deductibles: The most popular plan (Plan G) only has the Medicare Part B deductible ($283 in 2026)
- Copays/Coinsurance: Most Medigap plans cover these entirely
- No Maximum Out-of-Pocket: You don't need one — most plans cover nearly all your costs
- No Network Restrictions: See any Medicare provider without extra charges
Medigap offers cost predictability. You know what your monthly expense will be, and you won't face surprise bills when you need care.
Coverage Differences
What Medicare Advantage Covers
All Medicare Advantage plans must cover:
- Everything Original Medicare covers (hospital, medical)
- Emergency and urgent care nationwide
- An annual out-of-pocket maximum
Many plans also include:
- Prescription drug coverage (Part D)
- Dental, vision, and hearing benefits
- Fitness programs
- Over-the-counter allowances
- Transportation to medical appointments
- Telehealth services
What Medigap Covers
Medigap plans are standardized and labeled with letters (Plan G, Plan N, etc.). They focus on covering the gaps in Original Medicare:
- Part A hospital coinsurance and costs
- Part B copayments and coinsurance
- First three pints of blood
- Part A hospice care coinsurance
- Skilled nursing facility coinsurance
- Part A deductible ($1,736 in 2026)
- Foreign travel emergency coverage (most plans)
Plan G, the most popular Medigap plan, covers everything except the Part B deductible ($283 in 2026).
Network Restrictions: Freedom vs Savings
This is where the decision often becomes crystal clear for many people.
Medicare Advantage Networks
Most Medicare Advantage plans are HMOs or PPOs with defined networks. This means:
- HMO plans: You must use network providers (except emergencies) and typically need referrals to see specialists
- PPO plans: You have more flexibility but pay more to see out-of-network providers
- Network changes: Your doctor may leave the network, or the plan may drop them
- Referral requirements: Often needed to see specialists
- Prior authorizations: May be required for tests, procedures, or specialist care
If you travel frequently, have a vacation home, or see specialists regularly, network restrictions can be frustrating and costly.
Medigap Freedom
With Medigap and Original Medicare:
- See any doctor or hospital that accepts Medicare (roughly 90% of U.S. providers)
- No referrals needed to see specialists
- No prior authorizations required
- Coverage travels with you anywhere in the U.S.
- Most plans include foreign travel emergency coverage
This freedom is why many people prefer Medigap despite the higher premiums. Use our provider search to verify your doctors accept Medicare before you commit.
Which Option Fits Your Situation?
Choose Medicare Advantage If You:
- Are generally healthy with minimal healthcare needs
- Don't mind using network providers
- Want the lowest possible monthly premium
- Value extra benefits like dental and vision
- Rarely travel outside your local area
- Prefer having all coverage (including prescriptions) in one plan
- Have a tight monthly budget
Choose Medigap If You:
- Have chronic health conditions requiring frequent care
- Want complete freedom to choose your doctors
- Travel extensively or have multiple residences
- Prefer predictable healthcare costs
- See multiple specialists regularly
- Want to avoid prior authorization hassles
- Can afford higher monthly premiums for peace of mind
Real-World Scenarios
Sarah, 67, is healthy and only sees her doctor for annual checkups. She takes one generic medication. A Medicare Advantage plan with a $0 premium and included drug coverage saves her money. She's fine staying in-network since she rarely needs care.
James, 69, has diabetes and heart disease. He sees a cardiologist, endocrinologist, and primary care doctor regularly, plus has annual tests and procedures. With Medigap Plan G, he pays $175/month but has minimal out-of-pocket costs when he gets care. His predictable expenses and doctor freedom are worth the higher premium.
Linda splits her year between Michigan and Arizona. With Medigap, she can see doctors in both states without worry. Medicare Advantage would require her to choose a plan in one location, limiting her coverage when she travels.
Important Enrollment Considerations
When You Can Enroll
The best time to enroll in Medigap is during your Medigap Open Enrollment Period — the six months starting when you're both 65 or older AND enrolled in Medicare Part B. During this window, insurance companies cannot deny you coverage or charge more due to health conditions.
For Medicare Advantage, you can enroll during:
- Initial Enrollment Period (around age 65)
- Annual Election Period (October 15 – December 7)
Can You Switch?
Switching from Medicare Advantage to Medigap can be difficult after your initial enrollment period. Insurance companies can deny you or charge higher premiums based on your health. However, switching from Medigap to Medicare Advantage is generally easier.
This makes your initial choice particularly important. Not sure which fits you best? Use our coverage selector or learn more about switching →