Medigap Insurance: Insurers' Compliance With Federal Minimum Loss Ratio Standards, 1988-91

Pursuant to a congressional request and a legislative requirement, GAO reviewed the value of Medicare supplemental insurance (Medigap) through 1994 and Medigap compliance with federal loss ratio standards, focusing on: (1) Medigap insurers' loss ratio performance during 1990 and 1991; and (2) trends in company performance from 1989 through 1991.