Medicaid expansion may have reduced the number of addiction-related deaths between 2014 and 2015. From 2002 through 2015, the national rate of addiction-related deaths was 21.15 per 100,000 population. During this period, the national addiction-related death rate rose by 71.9%, from 16.0 per 100,000 population to 27.5 per 100,000 population. Without the Medicaid expansion under the Patient Protection and Affordable Care Act of 2010 (PPACA), the addiction-related death rate would have been higher. In the 22 non-expansion states that had net contractions in their Medicaid eligibility thresholds between . . .