Medicare Advantage vs Medigap
Two paths to fill the gaps in Original Medicare. They work very differently, and the right choice depends on your providers, prescriptions, and travel patterns.
Medicare Advantage replaces Original Medicare with a private bundled plan, usually with a defined network and lower monthly premium. Medigap supplements Original Medicare and covers most of its out-of-pocket costs, with broader provider choice and a higher premium. You cannot use both at once.
Side-by-side comparison
| Feature | Medicare Advantage (Part C) | Medigap (supplement) |
|---|---|---|
| Premium | Often $0 plus Part B premium | Plan premium plus Part B premium |
| Provider access | Defined network (HMO or PPO) | Any provider that accepts Medicare |
| Out-of-pocket maximum | Yes, capped annually | Plan-dependent, often near zero with Plan G or F |
| Prescription drugs | Usually bundled (MA-PD) | Buy a standalone Part D plan |
| Extras (dental, vision, hearing) | Often included | Not included |
| Travel coverage | Limited outside network area | Nationwide; some plans include foreign travel |
| Switching freely later | Change yearly during AEP or MA OEP | Underwriting applies outside the initial six-month window in most states |
Source: Medicare.gov plan structure overview. Always confirm specifics against your plan documents.
When Advantage tends to fit
- Your preferred doctors and hospitals are already in the plan network.
- You want predictable monthly premiums and bundled extras.
- You don't travel often outside your home area.
When Medigap tends to fit
- You want to keep any Medicare-accepting provider without referrals.
- You travel between states or spend part of the year elsewhere.
- You prefer higher premiums in exchange for very low surprise costs.
State rules matter
Several states offer extra Medigap protections that change the calculation. Check the enrollment page for your state to see how local rules affect your switching rights.
See enrollment rules by stateFrequently asked questions
- Can I switch from Medicare Advantage to Medigap later?
- You can, but outside of a guaranteed issue period, Medigap insurers can use medical underwriting and deny you or charge more based on health. A handful of states (including California, New York, Connecticut, Massachusetts, Maine, Oregon, Washington, and Missouri) offer broader switching rights.
- Does Medicare Advantage cost less than Medigap?
- Medicare Advantage usually has lower monthly premiums, sometimes zero, but uses copays and a defined network. Medigap has higher premiums but limits your out-of-pocket exposure and lets you see any Medicare-accepting provider. Total cost depends on how much care you use.
- Do I still need Part D with Medigap?
- Yes. Medigap does not cover prescriptions, so most people pair it with a standalone Part D plan. Most Medicare Advantage plans bundle Part D in already.
- Can I have both Medicare Advantage and Medigap?
- No. Medigap only works with Original Medicare. If you enroll in Medicare Advantage, you cannot use Medigap to cover Advantage cost-sharing.
Not sure which path fits?
Answer a few questions and get a personalized comparison based on your providers, prescriptions, and state.
Educational resource. Not legal, tax, or insurance advice.