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; Accepts clients using medication assisted treatment for alcohol use disorder but prescribed elsewhere; No formal relationship with prescribing entity; Does not treat opioid use disorders; Cognitive behavioral therapy; Motivational interviewing; Relapse prevention; Telemedicine/telehealth therapy; Trauma-related counseling; Private for-profit organization; State Substance use treatment agency; State mental health department; State department of health; Medicaid; Federal military insurance (e.g., TRICARE); Cash or self-payment; Adolescents; Young adults; Adult women; Pregnant/postpartum women; Adult men; Lesbian, gay, bisexual, transgender, or queer/questioning (LGBTQ); Veterans; Active duty military; Members of military families; Clients with co-occurring mental and substance use disorders; Clients with co-occurring pain and substance use disorders; Clients who have experienced sexual abuse; Clients who have experienced intimate partner violence, domestic violence; Clients who have experienced trauma; Comprehensive substance use assessment; Interim services for clients; Screening for substance use; Screening for mental disorders; Aftercare/continuing care; Discharge Planning; Treatment for other addiction disorder; Substance use disorder education; Individual counseling; Group counseling; Family counseling; Marital/couples counseling; Smoking not permitted; Adults; Female; Male; Vaping not permitted; Case management service; Domestic violence services, including family or partner; Mental health services; Social skills development