Substance use treatment; 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; Does not use medication assisted treatment for alcohol use disorder; Does not treat opioid use disorders; Private for-profit organization; State Substance use treatment agency; Commission on Accreditation of Rehabilitation Facilities (CARF); Medicaid; Private health insurance; Cash or self-payment; Payment assistance (check with facility for details); Adolescents; Adult men; Clients with co-occurring mental and substance use disorders; Comprehensive mental health assessment; Comprehensive substance use assessment; Screening for substance use; Screening for mental disorders; Drug or alcohol urine screening; Discharge Planning; Substance use disorder education; Individual counseling; Marital/couples counseling; Smoking not permitted; Female; Male; Specially designed program for DUI/DWI clients; Spanish; Vaping not permitted