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How do I decide between Medigap and Medicare Advantage?

A decision worksheet rather than a sales pitch. Six questions that settle it for most people.

Updated August 17, 2026 · 3 min read

This is the decision everything else hangs on, and it is usually made in a hurry with incomplete information. Here is a way to work through it deliberately.

Question 1: where are your doctors

List your primary care physician, every specialist you see, and the hospital you would want to use. Check each against the Advantage plans available at your address.

• All comfortably in network: Advantage is a real option.
• Any of them outside, or you value being able to go anywhere: the supplement path removes the question permanently.

See how to check properly.

Question 2: how do you actually live

• Do you spend part of the year in another state?
• Do you travel often, or cross into Mexico regularly?
• Are you likely to move in the next several years?

Yes to any of these leans strongly toward a supplement, which works nationwide with no service area. See Medigap and travel.

Question 3: what is your health outlook

Not how you feel today. What you know about your conditions and your family history.

This matters because of the underwriting clock. If a supplement is likely to be valuable to you later, the only guaranteed chance to buy one is now.

Question 4: run the two totals

1. Supplement path: twelve months of supplement premium, plus twelve months of a Part D plan, plus the annual Part B deductible. This is roughly both your best and worst case.
2. Advantage path: twelve months of plan premium, plus the annual out of pocket maximum. That is your worst case. Your best case in a healthy year is close to nothing.

Which worst case would you rather face, and what would you pay in good years to avoid the other one?

Question 5: what are the extras worth to you

Convert dental, vision, hearing and fitness benefits into dollars you would actually spend. If you have not seen a dentist in years, a cleaning benefit is worth little. If you need significant dental work, it may be worth real money.

Then check what a standalone dental and vision policy would cost alongside a supplement, which is often less than people assume.

Question 6: how do you want to deal with it

• Comfortable with referrals, prior authorization and checking networks each fall: Advantage is manageable and cheaper.
• Want to show a card and not think about it: the supplement path is what you are paying for.

If it is still close

When the numbers are near even, the tiebreaker is usually the underwriting clock. Starting on the supplement side keeps every future option open, since moving to Advantage later is always available. Starting on Advantage may close the supplement option permanently.

That is not an argument that Advantage is wrong. Most Medicare beneficiaries in this county are on Advantage plans and many are well served. It is an argument for making the choice on purpose. See the side by side comparison.