In this fifth of a series of ten briefs on state implementation efforts of the Affordable Care Act, researchers from the Urban Institute and Georgetown University provide a recap of their findings from a New York site visit conducted in December 2011. The findings in the report are based off of extensive interviews with state government officials, health care stakeholders and policy experts. New York's ACA implementation successes and challenges thus far relating to the health insurance exchange, Medicaid expansion, and private insurance market reforms, are discussed throughout the report. Current political difficulties and the state's history of involvement in insurance regulation and Medicaid eligibility expansion are also considered as New York moves ahead in implementing national health reform.