The Effect of the Affordable Care Act Medicaid Expansion on Disparities in Access to Care and Health Status.

Before the Affordable Care Act Medicaid expansion, nonelderly childless adults were not generally eligible for Medicaid regardless of their income, and Hispanics had much higher uninsured rates than other racial/ethnic subgroups. We estimated difference-in-differences models on Behavioral Risk Factor Surveillance data (2011-2016) to estimate the impacts of Medicaid expansion on racial/ethnic disparities in insurance coverage, access to care, and health status in this vulnerable subpopulation. Uninsured rates among all poor childless adults declined by roughly 9 percentage points more in states that expanded Medicaid. While expansion also had favorable impacts on most access and health outcomes among Whites in expansion states, there were relatively few such impacts among Blacks and Hispanics. Through 2016, Affordable Care Act Medicaid expansion was more effective in improving access and health outcomes among White low-income childless adults than mitigating racial/ethnic disparities.