On March 15, 2011, the Medicaid and CHIP Payment and Access Commission (MACPAC) released its first Report to the Congress on Medicaid and CHIP. The report: provides an overview on the Medicaid and CHIP programs, their roles in the U.S. health care system, and the key policy and data issues to be addressed; describes the analytic framework that the Commission will use in future work on policy issues outlined in its statutory charge on access to care and Medicaid payment policy; examines factors for assessing access to care, evaluating payment policies, and identifying key data sources for policy analysis and program accountability; and introduces Medicaid and CHIP Program Statistics, MACStats, a compilation of national and state-specific program information on eligibility, benefits, and Medicaid spending.