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 treat alcohol use disorder; Does not treat opioid use disorders; Private non-profit organization; State Substance use treatment agency; Federally Qualified Health Center; No payment accepted; Adult women; Adult men; Clients with co-occurring pain and substance use disorders; Clients with HIV or AIDS; Clients who have experienced sexual abuse; Clients who have experienced intimate partner violence, domestic violence; Clients who have experienced trauma; Comprehensive substance use assessment; Screening for substance use; Professional interventionist/educational consultant; Discharge Planning; Outcome follow-up after discharge; Alcohol Detoxification; Benzodiazepines Detoxification; Cocaine Detoxification; Methamphetamines detoxification; Opioids detoxification; Substance use disorder education; Individual counseling; Group counseling; Family counseling; Smoking permitted in designated area; Female; Male; Spanish; Vaping not permitted; Case management service; Social skills development