aarp medicare advantage plan Medicare is a specialized government program that provides health care insurance for elderly or disabled people with ages sixty five and older, which is a port of social security systems. The American Association of Retired Persons, or AARP, provides additional or supplementary insurance plans through different private insurance companies that help providing coverage on certain costs on health care that the main Medicare insurance does not or cannot cover. The AARP presents a set of Medicare supplement plans that offer additional benefits that are not usually covered by the main Medicare insurance issued by the government. The plans are offered by private insurance companies rather than the federal government. People with eligible ages and conditions are the ones only allowed to purchase any of the AARP Medicare supplement plans.