Medigap vs. Medicare Advantage
Two very different approaches to Medicare coverage. One pays more upfront for maximum freedom; the other pays less upfront with more cost-sharing and restrictions.
Medicare Supplement (Medigap)
Supplements Original Medicare by covering the gaps — deductibles, coinsurance, and copays. Higher monthly premium, but very little cost-sharing when you use healthcare. See any doctor who accepts Medicare, anywhere in the country.
Medicare Advantage (Part C)
Replaces Original Medicare with a private plan. Lower (or $0) premium, but you pay copays, coinsurance, and deductibles when you use care. Usually has a provider network and may require referrals. Often includes drug coverage and extras like dental and vision.
Side-by-side comparison
| Feature | Medigap | Medicare Advantage |
|---|---|---|
| Works with | Original Medicare (Part A + Part B) | Replaces Original Medicare |
| Monthly premium | Higher ($80–250/month typical) | Lower or $0 (but higher cost-sharing) |
| Out-of-pocket costs | Very low or none (after premium) | Copays, coinsurance, deductibles per service |
| Out-of-pocket maximum | Plans K and L have a cap; others effectively have none (because coverage is near-100%) | Required annual cap (typically $3,000–8,000) |
| Doctor choice | Any doctor who accepts Medicare, nationwide | Usually limited to a network (HMO or PPO) |
| Referrals needed | No | Often yes (HMO plans) |
| Prescription drugs | Not included — need separate Part D plan | Usually included |
| Extra benefits | None (focused on gap coverage) | May include dental, vision, hearing, fitness |
| Travel coverage | Most plans cover foreign travel emergency | Limited or no coverage outside service area |
| Switching plans | Can switch anytime, but may face underwriting | Can switch annually during open enrollment |
Which is right for you?
Medigap may be better if you...
- Want to see any doctor who accepts Medicare
- Travel frequently or split time between states
- Prefer predictable costs with minimal out-of-pocket
- Have chronic conditions requiring regular specialist care
- Value freedom over extra benefits like dental/vision
Medicare Advantage may be better if you...
- Want the lowest possible monthly premium
- Are comfortable with a provider network
- Want drug coverage, dental, and vision bundled in
- Live in one area and don't travel much for care
- Are healthy and don't expect high medical costs
Important note about switching
If you choose Medicare Advantage now, you can switch to a Medigap plan later — but you may face medical underwriting. This means the insurer can deny you or charge more based on your health history. If you start with Medigap during your Open Enrollment Period, you have guaranteed-issue rights and can always keep that coverage.