About East Portland Comprehensive Treatment Center in Portland, OR Located in Portland, Oregon, East Portland Comprehensive Treatment Center is a Comprehensive Treatment Center (CTC) that offers medication-assisted treatment (MAT) for adults age 18 and older of all genders who are struggling with opioid addiction. A great deal of scientific research has indicated that MAT is both a safe and effective way to help people successfully achieve lasting recovery from opioid addiction. Some methadone clinics provide one type of medication as part of their MAT programming, but our Portland center offers a variety of options, including Suboxone, buprenorphine, and methadone.