Impact of Medicaid, Race/Ethnicity, and Criminal Justice Referral on Opioid Use Disorder Treatment.

We examined the impact of Medicaid expansion and of race/ethnicity on medication-assisted treatment (MAT) for opioid use disorder among those referred for treatment through the criminal justice system. Using a cross-sectional design, we combined data from the Substance Use and Mental Health Services Administration's Treatment Episode Data Set with data on Medicaid expansion and age-adjusted mortality for drug poisoning deaths. Logistic regression was performed within state panels from 2012 to 2016, with 2014 excluded due to this being the transitional Medicaid expansion year. We found that Medicaid expansion led to an increase in the use of MAT to treat those referred to substance treatment facilities through the criminal justice system. We also identified key racial disparities in the use of MAT for those referred from the criminal justice system, with Blacks and Hispanics less likely to receive MAT than non-Hispanic Whites.