Since the beginning of the first open enrollment period under the Affordable Care Act (ACA) on October 2013 and April 2014, Medicaid/CHIP enrollment increased by 6.0 million. This accounts for almost half of enrollment increase projected by the Urban Institute's Health Insurance Policy Simulation Model to occur by the end of 2016 when the full ACA coverage effects are expected. Progress is greater in states that expanded Medicaid but there is variation even among these states. This variation is likely due in part to differences in outreach and application assistance efforts by states and whether they used fast-track enrollment strategies.