Medigap vs. Medicare Advantage: the decision behind the decision
We do not sell plans, so we can say this plainly: the choice is less about benefits and more about which door you want to be able to walk back through. The first six months of Part B decide that.
| Question | ●Original Medicare + Medigap (+ Part D) | ●Medicare Advantage (Part C) |
|---|---|---|
| Which doctors?Matters most for travel, second opinions, and specialists out of state. | Any that accepts Medicare | Plan networkHMO or PPO rules; referrals and prior authorization. |
| Monthly costPredictable vs. pay-as-you-go. | Part B $202.90 + Medigap premium + Part D premium | Part B $202.90 + plan premium (often $0) |
| Worst-case yearThe number that matters when something goes wrong. | SmallPlan G: Part B deductible ($283) then covered. | Up to the plan’s capFederal in-network maximum $9,250 in 2026. |
| Extras (dental, vision, gym)Real, but usually capped. | Not included | Often included |
| Can you change your mind?The asymmetric part. | To Advantage any open enrollment | Back to Medigap only with underwritingExcept guaranteed-issue cases (e.g., trial right in first 12 months). |
Premiums vary by county, age, and tobacco use; Advantage availability varies by county. Get current quotes from a licensed agent or Utah’s SHIP counselors.
The six months that decide it
Your Medigap open enrollment period runs six months from the month Part B starts, and during it insurers cannot use your health history. After it, Utah permits underwriting, so a 70-year-old with a cardiac history who wants to leave an Advantage plan may find Medigap unavailable or priced out. That is the whole reason the decision feels heavier than it should: choosing Advantage at 65 is easy to reverse for twelve months (the federal trial right) and hard after.
Utah’s birthday rule (new in 2025)
Since May 7, 2025, Utah law gives Medigap policyholders a yearly window: for 60 days starting on your birthday, your insurer must let you switch to any comparable or lower-tier plan it offers, with no medical underwriting (Utah Code 31A-22-620(3)(g)). It applies to the same insurer only, so it is not a way to change carriers, and it does not help someone leaving an Advantage plan. What it does is let a Plan G holder step down to a cheaper plan with the same company each year without a health review, which makes attained-age premium increases easier to manage. Compare Utah Medigap rates at medigap.utah.gov.
A way to decide that does not require predicting your health
Start with the doctors you will not give up
Check each one against Advantage networks in your county. Any “no” ends the comparison.
Price the worst year, not the average year
Medigap: twelve premiums plus $283. Advantage: the plan’s out-of-pocket maximum plus twelve premiums. Ask which number you could pay in a bad year.
Decide whether you want the door open
If you value the option to move to Original Medicare later without underwriting, Medigap at 65 is how you keep it.
Then, and only then, compare extras
Dental and gym benefits are real money, but they are the last input, not the first.
Where to get help without a sales pitch: Utah’s SHIP (Senior Health Insurance Information Program) counselors are trained volunteers, reachable statewide at 1-800-541-7735 and through each county’s Area Agency on Aging, and Medicare.gov’s plan finder shows every plan in your county. Our Utah pages list the local contacts. One more Utah option: anyone who ever had URS or PEHP benefits can buy the PEHP Medicare Supplement at 65 (Plan 100 is $154.17 a month at 65 in 2026); it is a group retiree supplement, not a lettered Medigap plan.
Sources
- Medicare.gov, "When can I buy a Medigap policy?"
- Medicare.gov, Medigap guaranteed-issue rights (including the 12-month trial right)
- CMS, 2026 Medicare Advantage maximum out-of-pocket limit
- Utah Insurance Department, Medicare / Medigap / Medicare Advantage
- Utah Code 31A-22-620(3)(g), Medigap birthday rule (effective May 7, 2025)
- PEHP Medicare Supplement (2026 rates)
- Medicare.gov, "Medicare costs" (2026)
Medigap vs. Advantage questions, answered
Why do people say not to get a Medicare Advantage plan?
Because it is hard to leave. Advantage plans use networks and prior authorization and can change each year; switching back to Original Medicare later usually means buying a Medigap policy through medical underwriting in Utah. The plan can be a fine choice; the one-way door is the caution.
What is the difference between Medigap and Medicare Advantage?
Medigap sits on top of Original Medicare and pays what Medicare does not, with any provider that takes Medicare, for a monthly premium. Advantage replaces Original Medicare with a private plan, often with a low premium and extra benefits, in exchange for a network and plan rules.
Do Advantage plans cost more in the long run?
It depends on your health. Advantage plans have out-of-pocket maximums (federal limit $9,250 in-network for 2026) that you reach only when sick; Medigap Plan G costs a premium every month and leaves you with little else. Healthy years favor Advantage; expensive years favor Medigap.
Can I switch from Advantage to Medigap later?
You can return to Original Medicare during open enrollment, but Medigap insurers in Utah may underwrite you unless you are in a guaranteed-issue situation, such as leaving your first Advantage plan within 12 months of joining at 65.
Related
Income surcharge calculator
Part B costs the same either way; the surcharge does too.
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Bring your birth date, your work situation, and last year’s tax return. Leave knowing your enrollment window, what Medicare will cost you, and whether the income surcharge applies.
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