Medicare, the federal health insurance program that primarily covers seniors and certain young Americans under age 65 with disabilities, is fairly widespread. The program is split into several parts, and beneficiaries typically pay a monthly premium for health coverage based on their income.
However, Medicare plans don't cover everything, so plan holders may encounter out-of-pocket costs. This is why some people enrolled in these plans choose to purchase Medicare supplement insurance, also known as Medigap coverage.