A Medicare Supplement Insurance (Medigap) policy, sold by private companies, can help pay some of the health care costs that Original Medicare doesn’t cover, like copayments, coinsurance, and deductibles.
Some Medigap policies also offer coverage for services that Original Medicare doesn’t cover, like medical care when traveling outside the U.S. If your clients have Original Medicare and they buy a Medigap policy, Medicare will pay its share of the Medicare-approved amount for covered health care costs. Then their Medigap policy pays its share. – Derived from Medicare.gov