Number of studies that find positive effects of Medicaid expansion as of 2021

As of March 2021, there have been a large number of studies that look into the effect of the Affordable Care Act Medicaid Expansion on various outcomes. Most of these findings generally show positive effects of Medicaid expansion compared to states that have not expanded Medicaid (as of January 2021, there were 12 non-expansion states). The largest number of studies focused on the effect of Medicaid expansion on access and utilization of care with 70 percent of studies reporting positive effects. Most notably, all 25 studies on state economy found that Medicaid expansion actually had a positive economic impact on expansion states. This statistic shows the number of studies on the positive, mixed, and negative effects of ACA Medicaid expansion in the U.S. published between January 2014 and March 2021, sorted by outcome.