Tennessee Code Title 56. Insurance § 56-7-3703

(a) If a utilization review organization makes an adverse determination for a prior authorization of a healthcare service, then the carrier or organization shall include the following in the notification to the enrollee and the enrollee's healthcare provider requesting the prior authorization on the enrollee's behalf:

(b) An adverse determination regarding a request for prior authorization for a healthcare service must be made by a licensed physician or a healthcare professional with the same or a similar specialty as the healthcare professional requesting the prior authorization.

(c) This section does not apply to an initial adverse determination for prescription drugs that are covered under an enrollee's benefit plan.