Medicare supplement insurance, also known as Medigap insurance, is private insurance that helps cover costs that original Medicare does not. The website MedicareSupplement-Insurance.com helps users find affordable Medigap plans through a network of local agents. They assist users in selecting plans that cover costs like copays, coinsurance, and deductibles to provide comprehensive coverage at the lowest possible price. The website provides information about Medicare eligibility, enrollment, the different parts of Medicare coverage, and how to contact them for assistance.