Tennessee Code Title 4. State Government § 4-3-1601

(a) There is created the department of mental health and substance abuse services.

(b) The general functions of the department are to coordinate, set standards for, plan for, monitor, and promote the development and provision of services and supports to meet the needs of persons with mental illness or serious emotional disturbance through the public and private sectors in this state as set out in applicable provisions of title 33.