Substance use treatment; Transitional housing, halfway house, or sober home; Treatment for co-occurring substance use plus either serious mental health illness in adults/serious emotional disturbance in children; Outpatient; Intensive outpatient treatment; Regular outpatient treatment; No formal relationship with prescribing entity; Accepts clients using medication assisted treatment for alcohol use disorder but prescribed elsewhere; No formal relationship with prescribing entity; Accepts clients using MAT but prescribed elsewhere; Brief intervention; Cognitive behavioral therapy; Motivational interviewing; Matrix Model; Relapse prevention; Substance use disorder counseling; Telemedicine/telehealth therapy; Trauma-related counseling; 12-step facilitation; Private non-profit organization; State Substance use treatment agency; The Joint Commission; Cash or self-payment; Sliding fee scale (fee is based on income and other factors); Clients with co-occurring mental and substance use disorders; Comprehensive mental health assessment; Comprehensive substance use assessment; Interim services for clients; Screening for substance use; Screening for mental disorders; Breathalyzer or blood alcohol testing; Drug or alcohol urine screening; Aftercare/continuing care; Discharge Planning; Outcome follow-up after discharge; Self-help groups; Mentoring/peer support; HIV or AIDS education, counseling, or support; Substance use disorder education; Individual counseling; Group counseling; Smoking permitted without restriction; Adults; Young adults; Female; Male; Vaping permitted in designated area; Case management service; Mental health services; Social skills development; Integrated primary care services