This report presents national- and state-level data from the Treatment Episode Data Set (TEDS) for admissions and discharges occurring in 2016, and trend data from 2006 to 2016. It summarizes demographic information and the characteristics and outcomes of treatment for alcohol and/or drug use among clients aged 12 years and older in facilities that report to individual state administrative data systems. Data include treatment admissions and discharges that were received and processed through March 16, 2018.