Tennessee Code Title 52. Department of Disability and Aging § 52-6-103

(a) The cost of evaluation and treatment under this section and § 52-6-102, if the defendant is charged with a misdemeanor, must be a charge upon the funds of the county.  If the court finds the defendant financially able to pay all or part of the costs and expenses for the evaluation and treatment, then the court may order the defendant to pay all or part of the costs and expenses.  Payment must be made to the clerk of the general sessions court for remittance to the person, agency, or facility to whom compensation is due, or, if the costs and expenses have been paid by the county, to the appropriate office of the county.

(b) Costs of the care or treatment of any defendant ordered by the court and who is charged with a misdemeanor must be paid by the state only when specifically authorized by law.