Substance use treatment; Treatment for co-occurring substance use plus either serious mental health illness in adults/serious emotional disturbance in children; Outpatient; Regular outpatient treatment; Does not use medication assisted treatment for alcohol use disorder; Does not treat opioid use disorders; Medication for mental disorders; Anger management; Cognitive behavioral therapy; Motivational interviewing; Trauma-related counseling; Telemedicine/telehealth therapy; Private non-profit organization; State department of health; Council on Accreditation (COA); Medicare; Medicaid; Federal military insurance (e.g., TRICARE); Private health insurance; Cash or self-payment; State-financed health insurance plan other than Medicaid; SAMHSA funding/block grants; Sliding fee scale (fee is based on income and other factors); Clients who have experienced trauma; Comprehensive mental health assessment; Outreach to persons in the community; Screening for tobacco use; Screening for substance use; Screening for mental disorders; Professional interventionist/educational consultant; Treatment for other addiction disorder; Individual counseling; Family counseling; Marital/couples counseling; Smoking not permitted; Children/adolescents; Female; Male; Vaping not permitted; Domestic violence services, including family or partner; Mental health services; Social skills development