Substance use treatment; Treatment for co-occurring substance use plus either serious mental health illness in adults/serious emotional disturbance in children; Residential/24-hour residential; Long-term residential; Short-term residential; Does not treat alcohol use disorder; Does not treat opioid use disorders; Medication for mental disorders; Private non-profit organization; State Substance use treatment agency; State mental health department; State department of health; Council on Accreditation (COA); Federal, or any government funding for substance use treatment programs; IHS/Tribal/Urban (ITU) funds; Medicaid; Federal military insurance (e.g., TRICARE); Private health insurance; Cash or self-payment; State-financed health insurance plan other than Medicaid; Adolescents; Lesbian, gay, bisexual, transgender, or queer/questioning (LGBTQ); Criminal justice (other than DUI/DWI)/Forensic clients; Clients with co-occurring mental and substance use disorders; Clients who have experienced sexual abuse; Clients who have experienced trauma; Comprehensive mental health assessment; Comprehensive substance use assessment; Outreach to persons in the community; Screening for tobacco use; Screening for mental disorders; Drug or alcohol urine screening; STD testing; TB screening; Aftercare/continuing care; Discharge Planning; Outcome follow-up after discharge; Self-help groups; Housing services; Assistance with obtaining social services; Mentoring/peer support; Employment counseling or training; Health education services other than HIV/AIDS or hepatitis; Substance use disorder education; Individual counseling; Group counseling; Family counseling; Smoking not permitted; Children/adolescents; Female; Sign language services for the deaf and hard of hearing; Spanish; Vaping not permitted; Case management service; Mental health services; Social skills development; Suicide prevention services