To help provide health insurance that is affordable for elderly people or the disabled in the United States; Medicare exists. However, Medicare does not cover all your expenses for health care. Those that are currently covered by Medicare could be eligible for some additional health insurance coverage through Medigap. This is the name given for supplemental policies designed to help pay for expenses a standard Medicare policies do not cover.
Qualifying for Medigap policies are available when covered by the standard Medicare policies including only Part A and Part B insurance coverage. Those that have Part C which is the Medicare Advantage Plan have no need for Medigap coverage and will not be able to purchase Medigap. Additional rules or qualifying guidelines for purchasing a Medigap plan. For example, some proof of residency in some states.