- TDMHSAS is the state’s mental health and substance abuse authority. Its mission is to plan for and promote the availability of a comprehensive array of quality prevention, early intervention, treatment, habilitation, and rehabilitation services and supports based on the needs and choices of individuals and families served. The department is responsible for system planning, setting policy and quality standards, system monitoring and evaluation, disseminating public information and advocating for persons of all ages who have mental illness, serious emotional disturbance, or substance abuse disorders.
- TDMHSAS annually assesses the public's needs for mental health, substance abuse, and recovery service supports. Title 33 of the Tennessee Code Annotated requires that functions of TDMHSAS be carried out in consultation and collaboration with current or former service recipients; their families, guardians, or conservators; advocates; providers; agencies; and other affected persons and organizations.
- A planning and policy council advises the department about plans, policies, legislation, service system needs, and budget requests. A majority of the council’s membership must be service recipients or members of their families.