Assertive Community Treatment (ACT) is an intensive multidisciplinary team that delivers a full range of services to people who have been diagnosed with a serious mental illness and whose needs have not been met by traditional mental health services. ACT delivers treatment through flexible and comprehensive support and rehabilitation services in an individual’s natural surroundings rather than traditional inpatient settings. Interventions are primarily delivered in a community-based setting. ACT focuses on using a small staff-to-client ratio of 1:10, with services being provided 24 hours a day, 7 days a week. ACT aims to reduce the number of inpatient psychiatric stays, emergency room visits, and incarcerations for individuals with mental illness.