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; Short-term residential; Does not use medication assisted treatment for alcohol use disorder; Does not use MAT for opioid use disorders; Medications for HIV treatment; Medications for Hepatitis C treatment; Clonidine; Medication for mental disorders; Cognitive behavioral therapy; Relapse prevention; Substance use disorder counseling; 12-step facilitation; Private for-profit organization; State Substance use treatment agency; State mental health department; State department of health; The Joint Commission; IHS/Tribal/Urban (ITU) funds; Private health insurance; Cash or self-payment; Clients with co-occurring mental and substance use disorders; Comprehensive mental health assessment; Complete medical history/physical exam; Screening for substance use; Screening for mental disorders; Breathalyzer or blood alcohol testing; Drug or alcohol urine screening; HIV testing; STD testing; TB screening; Metabolic syndrome monitoring; Testing for Hepatitis B (HBV); Testing for Hepatitis C (HCV); Discharge Planning; Outcome follow-up after discharge; Self-help groups; Assistance with obtaining social services; HIV or AIDS education, counseling, or support; Hepatitis education, counseling, or support; Health education services other than HIV/AIDS or hepatitis; Substance use disorder education; Individual counseling; Group counseling; Family counseling; Marital/couples counseling; Smoking permitted in designated area; Adults; Young adults; Female; Male; Vaping permitted in designated area; Case management service; Mental health services; Social skills development; Transportation assistance; Suicide prevention services