About Richmond Comprehensive Treatment Center in Richmond, IN Richmond Comprehensive Treatment Center (CTC) provides outpatient treatment to adults age 18 and older who are struggling with addictions to heroin, prescription painkillers, fentanyl, and other opioids. Our center, which is located in Richmond, Indiana, offers medication-assisted treatment, or MAT. MAT is a research-based, evidence-supported form of opioid addiction treatment that includes prescription medication and counseling. MAT has been closely studied for decades, and it has a well-documented history of being both safe and effective.