Preferred Family Healthcare’s, Inc. (PFH) Assertive Community Treatment for Transitional Aged Youth (ACTTAY) Expansion project will focus on 179 males and females aged 16-25, with serious mental illness (SMI), likely experiencing a first episode psychosis, and co-occurring disorders (COD), such as substance use (SUD), residing in the rural, economically disadvantaged, and impoverished northeastern Missouri counties of Lewis, Marion, Monroe, Pike, Ralls, and Shelby. These six (6) targeted counties are located within Missouri Department of Mental Health (DMH), Division of Behavioral Health’s Psychiatric Service Areas, including portions of regions 14 and 15. ACT-TAY will implement best practices for this targeted population, increase the number of clients served annually (predicated on staffing ratios, retention in the program, and completion/dropout/age-out rates) through the current, pilot ACT-TAY program by measurably expanding: a) staffing pattern; b) collaborative efforts and referral sources; and c) service area by three (3) counties. The ACT model is appropriate for a sub-set of youth who experience SMI/COD and lack community connection and familial support systems because of multi-disciplinary, client-focused, enhanced, case management and resources. ACT-TAY’s four (4) goals and corresponding, measurable objectives have been established to measure the decrease in hospitalizations, homelessness, and criminal justice system involvement and improvement of health and social outcomes through intensive outreach and service coordination in the service area, as follows: 1. Increase access to ACT model and services for individuals with SMI and reduce barriers to treatment for those with COD; 2. Improve overall health and wellness for individuals with SMI and COD, as a result of ACT-TAY; 3. Increase community connection and peer support network for individuals with SMI and COD; 4. Further, through ACT-TAY, participants will also have access to services that were previously not available (e.g. trauma-specific, youth-focused, SMI and COD treatment using the ACT model), and supportive resources, for which gaps and disparities have consistently affected recovery and symptom severity (e.g., safe, secure housing, health, wellness, access to psychiatric and medication management services, financial management services, family counseling, time-unlimited treatment, and peer/alumni support to coordinate community connections), and enrollment in publicly funded programs to increase health insurance and benefits coverage project goals.