Can my Medigap plan pay a claim that Original Medicare denied?

Health insuranceWho paysChecked Nov 5, 2026

From K.Actuary, founded by Sangmin Kwon, ASA · sources checked 2026-11-05 · Source: Medicare.gov · Learn what Medigap Covers View original ↗

In short

Medigap mostly pays your share for care that Medicare covers.
If Medicare says no, Medigap usually says no too.
The main fix is to appeal to Medicare. You have 120 days.

What this means

Medicare.gov says Medigap helps pay your share of costs for care that Original Medicare covers. That means copays, coinsurance, and deductibles [1]. When you get care, Medicare pays its share first. Then Medigap pays what you owe under your policy [2].

Some Medigap plans cover a few things Medicare does not, like emergency care on a trip outside the U.S. Medigap generally does not cover long-term care, vision or dental care, hearing aids, glasses, or private-duty nursing [1].

So if Medicare said no to a service, the main path is to appeal Medicare's decision. File the first appeal within 120 days after you get your Medicare Summary Notice [3].

Your next step

Appeal the Medicare denial using your Medicare Summary Notice. Also ask your Medigap company in writing whether your plan covers this service on its own (for example, foreign travel emergency).

Deadline: 120 calendar days after you receive the MSN.

Check it yourself

Your Medigap plan letter (A–N) and policy show its benefits. Massachusetts, Minnesota, and Wisconsin standardize Medigap differently — "Don't know yet" for those states from these pages.

Where this comes from (3)

[1] Medicare.gov · Learn what Medigap Covers · checked 2026-11-05
Medigap plans help cover your share of costs for services that are covered by Original Medicare (Part A and Part B). … Some Medigap policies cover services that Original Medicare doesn't cover, like emergency medical care when you travel outside the U.S. (foreign travel emergency care). … Medigap plans generally don't cover: Long-term care (like care in a nursing home) Vision or dental care Hearing aids Glasses Priva…
[2] Medicare.gov · Learn How Medigap Works · checked 2026-11-05
If you have a Medigap policy and get care, Medicare will pay its share of the Medicare-approved amount for covered health care costs. In most Medigap policies, you agree to have the Medigap insurance company get your Part B claim information directly from Medicare. Then, your Medigap policy will pay your doctor whatever amount you owe under your policy and you're responsible for any costs that are left.
[3] eCFR · 42 CFR 405.942 · § 405.942(a) · checked 2026-11-05
any request for redetermination must be filed within 120 calendar days from the date a party receives the notice of the initial determination.

How we found this

We matched your question to 3 official sources, quoted the exact lines, and re-checked each quote against its source on 2026-11-05.

What we don’t know yet

Your own plan or notice may say something different. If your letter cites another rule, send it and we will look again.

Every answer is checked against the official rule it quotes.

Information only — not legal advice. Your plan, insurer or agency decides.

This answer quotes the official sources listed above, with the date we checked them. Your own policy, notice and state rules control. We are not your lawyer or your insurer. We don’t file, argue or negotiate claims for you — you send any letter or form yourself.

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