The Affordable Care Act (ACA) includes many new policies intended to reduce the number of people without health insurance. This brief highlights new state and sub-state estimates of how the number and composition of individuals enrolled in Medicaid/CHIP would change with full implementation of the ACA, including the Medicaid expansion. These estimates provide more detail on the projected coverage changes under the ACA at the state level than in prior research and provide guidance on the areas that are likely to experience the largest declines in the uninsured and where the residual uninsured are likely to be concentrated.

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