About Vancouver Comprehensive Treatment Center in Vancouver, WA Vancouver Comprehensive Treatment Center is a respected provider of personalized outpatient care for adults who have developed opioid use disorder, which is the clinical term for opioid addiction. Our center in Vancouver, Washington, offers medication-assisted treatment (MAT) to adults age 18 and older of all genders. MAT is an evidence-based service that incorporates prescription medication and therapeutic support to help adults end their opioid use and pursue lifelong recovery from opioid addiction.