Baseline data collected: Data collected at baseline will include (with examples): demographics (age, gender, race), substance use history (type of substances used, duration of use, routes of abuse), type of pain disorder (previous traumatic injury, musculoskeletal, neuropathic), co-existing medical problems (seizures, hepatitis C), prior injuries (accidents, interpersonal violence), prior mental health problems (prior treatment, diagnoses), prior substance abuse treatment (outpatient, inpatient), socioeconomic variables (educational level, occupation, employment history), criminal history (number of arrests and convictions, total amount of time spent in jail or prison), family history (first degree relatives with substance use disorders) and scores on psychometric testing (ASI).