The proposed study will compare three alternative interventions in the emergency department (ED) to promote linkage to substance abuse assessment, referral and treatment entry for those who meet abuse/dependence criteria for stimulants, cannabis, and/or non-injected opioids: (1) a 5-session Strengths-Based Case Management (SBCM) model; (2) a 2-session Brief Motivational Enhancement (BME); or (3) a one-time Brief Informational Feedback (BIF) session. The primary outcome variables for this trial include receiving an assessment and referral and treatment entry. Other outcomes include degree of treatment completion, substance-related measures, health service utilization, health status changes, and psychosocial factors.

Inclusion Criteria:

• (1) adults age 19-60 presenting to the Hurley Medical Center ED within 24 hours of an injury; (2) ability to provide informed consent.

Additional inclusion criteria for intervention study: meets criteria for substance abuse or dependence for stimulants (cocaine powder, crack cocaine, methamphetamine, amphetamine), cannabis (marijuana, hashish), and or opioids (noninjected heroin, other opioids such as hydrocodone and oxycodone) in the previous year.

Exclusion Criteria:

• (1) adult patients who do not understand English; (2) prisoners; (3) adults classified by medical staff as "Level 1 trauma"; (4) adults deemed unable to provide informed consent as stated above (e.g., intoxication, mental incompetence); (5) patients treated in the ED for suicide attempts and sexual assaults; (6) patients who have been in treatment for substance abuse in the past six months; (7) patients who are triaged to psychiatric emergency services; and (8) patients who report injecting heroin or other opiates in the past year.