A Medicare supplement (Medigap) insurance, sold by private companies, can help pay some of the health care costs that Original Medicare doesn't cover, like co-payments, coinsurance, and deductibles.

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Some Medigap policies also offer coverage for services that Original Medicare doesn't cover, like medical care when you travel outside the U.S. If you have Original Medicare and you buy a Medigap policy, Medicare will pay its share of the Medicare-approved amount for covered health care costs. Then your Medigap policy pays its share.

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CARRIERS

UnitedHealthcare

Continental/Aetna

Cigna/ Health Spring

Loyal American Life-Cigna

Mutual of Omaha

United American

BCBS Medigap Blue

Aflac/Aetna

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