Medigap is additional health care insurance provided by private insurance companies to cover the gaps in the Medicare Plan. Medigap policies are regulated by Federal and State Laws in order to protect you as a beneficiary. Medigap policies have to be clearly labeled as “Medicare Supplement Insurance”, and the policies are standardized for each State. Medigap coverage works only in conjunction with a Medicare Plan. Typically, you must have Medicare Part A and Part B in order to be eligible for Medigap. Acceptance of your application is guaranteed if you are 65 or older and apply within six (6) months of your initial enrollment in Plan B of Medicare.