Insurance which may be purchased by an individual to add to the benefits provided that individual under Medicare itself. Intelligent purchase of such insurance was virtually impossible until 1992, when uniform benefit packages, which standardized benefits for Medicare supplement insurance, were mandated by the federal government. A total of 10 standard plans (“A” through “J”) were specified. No insurance company can offer such insurance with benefits below the minimum, Plan A. If an insurance company wants to offer more elaborate benefits, each offering must conform with one of the other nine plans, Plans B through J.