Assertive community treatment (ACT) is an intensive and highly integrated approach for community mental health service delivery. ACT teams serve individuals with the most serious forms of mental illness, predominantly but not exclusively the schizophrenia spectrum disorders. ACT service recipients may also have diagnostic profiles that include features typically found in other DSM-5 categories (for example, bipolar, depressive, anxiety, and personality disorders, among others). Many have histories of substance abuse, victimization and trauma, psychiatric hospitalization, arrests and incarceration, homelessness, and additional significant challenges. The symptoms and complications of their mental illnesses have led to serious functioning difficulties in several areas of life, often includin