This week, our In Focus section reviews publicly available data on enrollment in capitated financial and administrative alignment demonstrations (“Duals Demonstrations”) for beneficiaries dually eligible for Medicare and Medicaid (duals) in 10 states: California, Illinois, Massachusetts, Michigan, New York, Ohio, Rhode Island, South Carolina, Texas, and Virginia. Each of these states has begun either voluntary or passive enrollment of duals into fully integrated plans providing both Medicaid and Medicare benefits (“Medicare-Medicaid Plans,” or “MMPs”) under three-way contracts between the state, the Centers for Medicare & Medicaid Services (CMS), and the MMP. As of January 2017, more than 386,000 duals are enrolled in an MMP, according to state and CMS enrollment reports, the highest monthly enrollment total since the demonstrations began in late 2013. Additionally this week, we highlight key takeaways from the 2017 update to the data book, “Beneficiaries Dually Eligible for Medicare and Medicaid,” published in January 2017 by the Medicaid and CHIP Payment and Access Commission (MACPAC) and the Medicare Payment Advisory Commission (MedPAC).