Gotanda H, et al. - Experts tried to find out the correlation between the expansion of the Medicaid program under the Affordable Care Act and differences in healthcare spending among low-income adults during the first four years of the policy implementation between 2014 and 2017. They designed a quasi-experimental difference-in-difference analysis to test out-of-pocket spending and financial burden among low-income adults after Medicaid expansions in the United States. A total of 37,819 adults (aged 19-64 years, with family incomes below 138% of the federal poverty level, from the 2010-17 Medical Expenditure Panel Survey) were enrolled in the study. The results of this study indicated that Medicaid expansions under the Affordable Care Act were correlated with lower out-of-pocket spending and a lower likelihood of catastrophic financial burden for low-income adults in the third and fourth years of the act’s implementation. Among low-income adults, these data imply that the act has been successful nationally in developing financial risk protection against medical bills.