About Seymour Comprehensive Treatment Center in Seymour, IN Located in Seymour, Indiana, Seymour Comprehensive Treatment Center (CTC) provides outpatient treatment for adults age 18 and older whose lives have been disrupted by opioid use disorder. Our clinic specializes in medication-assisted treatment (MAT), which is a whole-person approach to opioid addiction treatment that combines medication with counseling. Because we aren’t a traditional methadone clinic, we are able to offer more than one type of medication to help people achieve recovery from opioid addiction.