KFF October 18, 2024
Medicare supplement insurance, known as Medigap, helps cover Medicare Part A and Part B cost-sharing requirements, including deductibles, copayments, and coinsurance. Medigap policies, which are sold by private insurance companies, are a key source of supplemental coverage for people in traditional Medicare without employer-sponsored retiree benefits or Medicaid (Medigap does not work with Medicare Advantage). In 2022, 12.5 million Medicare beneficiaries, or 42% of all traditional Medicare beneficiaries, had a Medigap policy. However, federal requirements that prohibit the use of medical underwriting by insurers when issuing Medigap policies – known as guaranteed issue protections – are limited, which means it may be hard or impossible for people with pre-existing conditions, like asthma or cancer, to get a Medigap policy, outside...