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How do I decide between Medigap and Medicare Advantage?

Six questions settle it for most people. Your doctors, your travel, your health outlook, the two cost totals, the extra benefits, and the paperwork.

Updated September 3, 2026 · 4 min read · by Gerino Alejos

Six questions settle this for most people. They cover your doctors, your travel, your health outlook, the two cost totals, the extra benefits, and how much paperwork you want. Work through them in order.

A Medicare Supplement, also called Medigap, pays part of what Original Medicare leaves you owing. A Medicare Advantage plan is a private plan that takes over paying your Medicare bills.

Question 1: where are your doctors

Write down your primary care doctor, every specialist you see, and the hospital you would want to use. Check each name against the Advantage plans sold at your address. A network is the list of doctors and hospitals a plan contracts with.

• Everyone on your list is in the network. An Advantage plan is a real option for you.
• Someone is outside it, or you want to be able to go anywhere. A supplement removes that question for good.

See how to check a plan's doctor list.

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?

A yes to any of those leans toward a supplement. A supplement has no service area, no map of counties where it works, so it works anywhere in the country. See Medigap when you travel or move.

Question 3: what is your health outlook

Not how you feel today. What you know about your conditions, and what runs in your family.

This matters because of underwriting, which means the company can look at your health history and say no. If a supplement may be worth having later, your guaranteed chance to buy one is the six month window that starts when your Part B begins.

Question 4: run the two totals

Add up a full year on each path. A premium is the monthly bill. The Part B deductible is the amount you pay yourself each year before Part B starts paying.

1. Supplement path. Twelve months of supplement premium, plus twelve months of a Part D drug plan, plus the yearly Part B deductible. A healthy year and a hard year land in about the same place.
2. Advantage path. Twelve months of plan premium, plus the yearly out of pocket maximum, which is the most the plan can make you pay in one year. That is your worst year. In a healthy year you may pay close to nothing.

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

Question 5: what are the extras worth to you

Turn dental, vision, hearing and gym 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 real dental work, it can be worth real money.

Then price a standalone dental and vision policy, one you buy on its own, to sit alongside a supplement. It often costs less than people assume.

Question 6: how do you want to deal with it

Advantage plans use referrals, a note from your primary doctor before you see a specialist, and prior authorization, the plan's approval before certain care is covered. You also recheck the network each fall.

• If that is fine with you, an Advantage plan is manageable and usually costs less month to month.
• If you would rather show one card and not think about it, that is what the supplement premium buys.

If it is still close

When the two totals land near each other, the tiebreaker is usually underwriting. Starting on the supplement side keeps your later options open, because moving to Advantage is always available. Starting on Advantage may close the supplement option for good.

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

If you want to start with a quick call, see your Medicare options. Enter your ZIP code and a licensed agent calls you back.

Answer the six questions in order, then have both paths priced at your address. Call our McAllen office at (956) 687 3334, or enter your ZIP code in the form on this page.

Gerino Alejos

Licensed insurance agent · License 3128710 · NPN 18243381

Owner of McAllen Insurance Group, an independent agency on North 10th Street in McAllen. Works with clients across Hidalgo, Cameron and Starr counties on Medicare, Marketplace health, life and auto coverage. Se habla español.