Across the country, Medigap is providing over 10 million Medicare beneficiaries with peace of mind about their financial security and the reliability of their health care benefits to provide coverage for catastrophic events. Medigap policies generally cover a large portion of expenses not covered by Medicare, such as Medicare's coinsurance, copayments, deductibles and other out-of-pocket costs, offering a sense of security about both the predictable and unpredictable costs associated with health care.