Drug and alcohol oral fluid testing; Drug or alcohol urine screening; STD testing; Aftercare/continuing care; Discharge Planning; Self-help groups; Mentoring/peer support; Substance use disorder education; Smoking/vaping/tobacco cessation counseling; Individual counseling; Group counseling; Family counseling; Smoking not permitted; Adults; Young adults; Female; Male; Case management service; Mental health services; Social skills development; Substance use treatment; Treatment for co-occurring substance use plus either serious mental health illness in adults/serious emotional disturbance in children; Residential/24-hour residential; Long-term residential; Does not treat alcohol use disorder; Does not treat opioid use disorders; Motivational interviewing; Matrix Model; Relapse prevention; Substance use disorder counseling; Private non-profit organization; Council on Accreditation (COA); Federal, or any government funding for substance use treatment programs; Adolescents; Clients with co-occurring mental and substance use disorders; Clients who have experienced trauma; Comprehensive mental health assessment; Comprehensive substance use assessment; Screening for tobacco use; Screening for substance use; Screening for mental disorders