Medicare Supplement Insurance, also known as Medigap, is a type of insurance policy that helps cover the gaps left by Original Medicare. While Original Medicare covers most medical expenses, it doesn’t cover everything, leaving you with some out-of-pocket costs like deductibles, copayments, and coinsurance. Medigap policies are sold by private insurance companies and can help cover some or all of these costs. Here are the top 5 frequently asked questions about Medicare Supplement Insurance: