1. Opioid use disorders: HHS needs measures to assess the effectiveness of efforts to expand access to medication-assisted treatment : report to majority leader, U.S. Senate Publication: Washington, DC : United States Government Accountability Office, October 2017 Subject(s): Health Services AccessibilityOpiate Substitution TreatmentOpioid-Related Disorders -- drug therapyOutcome Assessment (Health Care)Community-Institutional RelationsBuprenorphine -- therapeutic useInservice TrainingInsurance CoverageMethadone -- therapeutic useNaloxone -- therapeutic useNaltrexone -- therapeutic usePrescription Drug Diversion -- prevention & controlHumansUnited StatesUnited States. Department of Health and Human Services.