Tennessee Code Title 68. Health, Safety and Environmental Protection § 68-115-403

(a) All professional combatants shall be required to submit to a pre-contest physical examination within forty-eight (48) hours of, or the day prior to, the scheduled start of the contest. A random urine drug screen to determine the use of banned or illegal substances may be required of a combatant, within the time specified in this chapter, prior to a contest.

(b) All physical examinations required pursuant to subsection (a) shall be performed by a ringside physician.

(c) A professional combatant shall be subject to additional blood testing for infectious diseases if more than ninety (90) days have elapsed since the combatant's license was issued.

(d) All expenses incurred pursuant to this section shall be paid by the promoter.