Formerly known as the Outcomes Monitoring System (OMS), the Iowa Treatment Outcomes Monitoring (iTOM) project is conducted by the Consortium under contract from the Iowa Department of Public Health (IDPH) Division of Behavioral Health, Bureau of Substance Abuse. This project is an independent evaluation of substance use disorder treatment outcomes in Iowa. Follow-up interviews are conducted with randomly selected patients from substance use disorder treatment agencies receiving IDPH funding approximately six months after admission to the treatment program.