What Each Path Actually Is
Original Medicare + Medigap + Part D. Medicare pays first; your Medigap plan helps with the deductibles and coinsurance Medicare leaves behind; a separate Part D plan covers drugs. You can see any provider in the country that accepts Medicare — no networks, no referrals.
Medicare Advantage. A private plan delivers your Part A and B benefits (usually with drugs built in), typically with extras such as dental, vision, or hearing allowances. You use the plan's network, follow its rules for referrals or authorizations where they apply, and your yearly costs are capped by the plan's out-of-pocket maximum.
The Trade-Offs, Plainly
- Monthly cost: Medigap adds a real premium every month. Advantage premiums are often low or $0.
- Cost when you use care: Medigap makes most costs predictable. Advantage charges copays/coinsurance as you go, up to an annual cap.
- Choice of doctors: Medigap = any Medicare provider nationwide. Advantage = the plan's network, which can change year to year.
- Travel and snowbirding: Medigap travels with you anywhere Medicare is accepted. Advantage networks are local by design, with emergency coverage away from home.
- Extras: Advantage plans often include dental/vision/hearing benefits; Original Medicare + Medigap generally does not (those can be added as separate policies).
- Complexity through the year: Medigap is quiet once it's in place. Advantage plans reset annually — benefits, networks, and drug lists can all change, which makes the yearly review genuinely important.
Why Timing Changes the Answer
When you turn 65 with Part B, you get a one-time, six-month Medigap Open Enrollment window during which no insurer can deny you or charge more for your health. After that window, switching into Medigap can involve medical underwriting in many situations. Practically: the Medigap door is widest exactly once, while the Advantage door reopens every fall. That asymmetry is worth having explained against your own health picture before you choose.
The Honest Bottom Line
People who value predictability, broad access, and travel flexibility often lean Medigap. People who value low monthly cost and bundled extras often lean Advantage. Both can be the right answer; the mistake is choosing by ad instead of by fit. A licensed agent can put your doctors, drugs, and budget against both paths side by side — free — and show you the actual numbers.