The Government Accountability Office (GAO), the federal agency that examines how taxpayer dollars are spent, issued a new report on behavioral health benefit availability under Medicare and Medicare Advantage (MA) programs. The GAO reports findings on what beneficiaries pay out of pocket, and oversight by the Centers for Medicare & Medicaid Services of cost-sharing in MA plans for behavioral health services. Behavioral health conditions were estimated to affect at least a quarter of the 66.7 million Medicare beneficiaries in 2023. The 2023 National Survey on Drug Use and Health estimated approximately 7.7 million nonmetropolitan adults reported having any mental illness (AMI) in 2023, accounting for 22.7 percent of non-metropolitan adults.