Tenn. Code Ann. § 38-5-107: Surgeon or physician as witness

The coroner may also summon as a witness a surgeon or physician, when requested so to do by the district attorney general, to make examination of the body, including the performing of an autopsy, and give a professional opinion as to the cause of death, whose fee shall not exceed twenty-five dollars ($25.00), and the fee shall be allowed in the bill of costs.