The Government Accountability Office (GAO) has issued a report examining (1) the extent to which certain Medicare Part D drug plan sponsors have implemented programs to control fraud, waste, and abuse, and (2) the extent of CMS’s oversight of Part D plan sponsors’ programs to control fraud, waste, and abuse. The GAO concluded that five of the largest Part D plan sponsors’ had not completely implemented all of CMS’s required compliance plan elements and selected recommended measures for Part D fraud and abuse programs. Moreover, CMS oversight of Part D sponsors’ fraud and abuse programs has been limited. The GAO recommends that CMS conduct timely audits of Part D sponsors’ fraud and abuse programs, and CMS concurred.