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 use MAT for opioid use disorders; Anger management; Brief intervention; Cognitive behavioral therapy; Motivational interviewing; Relapse prevention; Substance use disorder counseling; Trauma-related counseling; Telemedicine/telehealth therapy; Private for-profit organization; Private health insurance; Cash or self-payment; Comprehensive substance use assessment; Screening for substance use; Screening for mental disorders; Aftercare/continuing care; Treatment for other addiction disorder; Health education services other than HIV/AIDS or hepatitis; Individual counseling; Family counseling; Marital/couples counseling; Children/adolescents; Female; Male; Mental health services; Social skills development; Suicide prevention services