This study of Medicaid and CHIP managed care programs in 20 states indicates that capitation rate-setting became more data-driven and transparent during the time period 2001-2010. Benefit packages were fairly consistent over time and among states, with carve outs in every state for a least one acute service. Total spending on managed care services for Medicaid enrollees varied considerably across states and subgroups; nondisabled children had the lowest average monthly spending and adults with disabilities had the highest.