Percent of persons admitted for primary dependence on heroin, non-prescribed methadone, or opiates/synthetics, as reported to the Treatment Episode Dataset-Admissions, for which treatment with the opioid agonists methadone or buprenorphine was planned as a function of outpatient (circles; TEDS categories “ambulatory non-intensive” or “intensive outpatient”) or detoxification (squares; TEDS categories “24-hr hospital based”, “free-standing”, or “ambulatory”) treatment, between 2006 and 2015. Lines represent significant joinpoint trends within each treatment domain over time.