Can You Have a Medicare Savings Program and a Medigap Policy at the Same Time?

If you have QMB, you generally don't need a Medigap (Medicare Supplement) policy — QMB already pays your Part A and Part B premiums, deductibles, coinsurance, and copays, which is exactly what a Medigap plan is designed to do. You can usually keep an existing Medigap policy after you're approved for QMB, but most insurers won't sell you a new one once you have it.

Why QMB and Medigap Cover the Same Ground

Medigap policies exist to pay the Medicare cost-sharing that Original Medicare leaves you owing — the Part A and Part B deductibles, coinsurance, and copays. QMB, the most comprehensive Medicare Savings Program tier, pays those exact same costs at no charge to you, and federal law bars providers from billing QMB enrollees for them at all (Centers for Medicare & Medicaid Services, medicare.gov/basics/costs/help/medicare-savings-programs). Once you have QMB, a Medigap policy is largely covering costs you would never be billed for in the first place.

Can You Keep an Existing Medigap Policy After Getting QMB?

In most states, yes — becoming eligible for QMB doesn't automatically cancel a Medigap policy you already own. Some people choose to keep it anyway, for reasons like maintaining continuous coverage in case they ever lose MSP eligibility, or because a specific policy offers a benefit QMB doesn't (QMB doesn't cover foreign travel emergency care or Part B excess charges, for example, which some Medigap plans do). But since QMB is already paying the core cost-sharing, keeping the premium payments up can mean paying for overlapping coverage. Rules on this vary by state, so confirm with your state Medicaid agency or insurance department before deciding either way.

Can You Buy a New Medigap Policy If You Already Have QMB?

Generally, no. Insurance regulators restrict selling a new policy that duplicates coverage you already have, and QMB duplicates the core benefit a Medigap plan provides. A licensed agent shouldn't sell you a new Medigap policy once you're enrolled in QMB, and if one tries to, that's worth reporting to your state insurance department. If you're only eligible for SLMB or QI — not QMB — this restriction doesn't apply the same way, since those tiers only pay your Part B premium and leave your deductibles and coinsurance exposed, which a Medigap policy would still meaningfully cover.

What If You're on SLMB or QI Instead of QMB?

SLMB and QI only cover your Part B premium — they don't touch deductibles, coinsurance, or copays. If you have SLMB or QI, a Medigap policy still fills a real gap, and there's no duplication issue with buying or keeping one. It's specifically QMB's broader coverage that overlaps with what Medigap sells. See our full breakdown of QMB, SLMB, and QI if you're not sure which tier you have or might qualify for.

Worried a provider is billing you for costs QMB already covers? See our guide to QMB's balance billing protections and what to do about it.

Not sure which Medicare Savings Program tier you qualify for? Check your eligibility free in about 90 seconds — it stores no personal information.

Disclaimer: Medigap rules involving dual-eligible beneficiaries vary by state and by insurer, and can change. This article is general education, not insurance advice. Before dropping or keeping a Medigap policy, talk to your State Health Insurance Assistance Program (SHIP) counselor or your state insurance department.