On July 17, 2018, the Centers for Medicare & Medicaid Services (CMS) approved a Washington State Medicaid 1115 waiver request to launch an addiction treatment demonstration project. The demonstration will run through December 31, 2021. The Washington State Health Care Authority (HCA) plans to build upon a continuum of outpatient, residential, and inpatient services for adult Medicaid beneficiaries diagnosed with opiate use disorder (OUD) and/or other substance use disorders (SUD). Through the demonstration, the state will be able to claim the federal Medicaid match rate for short-term addiction treatment provided in residential and inpatient treatment facilities that meet . . .