In Original Medicare, you generally pay some of the costs for approved services. Medicare Supplement Insurance (Medigap) is extra insurance you can buy from a private company to help pay your out-of-pocket costs that Original Medicare doesn’t cover.

Medigap, also known as Medicare supplement insurance, is an insurance policy that supplements Original Medicare. It’s designed to cover some or all of the out-of-pocket costs that a beneficiary would otherwise have to pay for services covered by Original Medicare.

Medigap, also known as Medicare Supplement insurance, helps fill "gaps" in Original Medicare and is sold by private insurance companies like Anthem. A Medicare Supplement insurance (Medigap) plan can help pay some of the remaining healthcare costs not covered by Original Medicare, like copays, coinsurance, and deductibles.