Iowa Admin. Code r. 875-173.4
If a contestant claims to be injured during the bout, the referee shall stop the bout and request the attending physician or physician assistant to make an examination. If the physician or physician assistant decides that the contestant has been injured as the result of a foul, the physician or physician assistant shall advise the referee of the injury. If the physician or physician assistant is of the opinion that the injured contestant may be able to continue, the physician or physician assistant shall order a five-minute intermission, after which the physician or physician assistant shall make another examination and again advise the referee of the injured contestant's condition. It shall be the duty of the promoter to have an approved physician or physician assistant in attendance during the entire duration of all bouts.
Iowa Admin. Code r. 875-173.4