On August 5, 2019, the Delaware Department of Health and Social Services (DHSS) announced that the Centers for Medicare & Medicaid Services (CMS) approved the state’s Medicaid waiver amendment to use institutions of mental disease (IMDs) to use federal Medicaid funding for substance use disorder (SUD) addiction-related treatment. An IMD is an inpatient or residential behavioral health facility with more than 16 beds; normally, federal Medicaid will not provide matching funds for services provided in an IMD to adult beneficiaries. In addition to approving the IMD waiver amendment, CMS also approved an extension of the Delaware Medicaid demonstration . . .