The Government Accountability Office (GAO) has issued a report on trends in Medicaid managed care spending, enrollment, and oversight.  Notably, the GAO reports that over 10 years (FY 2004 through 2014), federal Medicaid managed care spending grew from $27 billion to $107 billion, representing 38% of total federal Medicaid spending in 2014.  The report also examines selected states’ medical loss ratio standards and methods for automatically assigning Medicaid beneficiaries to managed care organizations. Separately, the Medicare Payment Advisory Commission (MedPAC) and the Medicaid and CHIP Payment and Access Commission (MACPAC) have jointly released a data book on “Beneficiaries Dually Eligible for Medicare and Medicaid.”  The data book includes updated information on Medicare-Medicaid dual eligible beneficiary demographic characteristics, expenditures, and use of health care services.