(a) Order for examination. When the mental or physical condition (including the blood group) of a party, or of a person in the custody or under the legal control of a party, is in controversy, the court in which the action is pending may order the party to submit to a physical examination by a physician or to submit to a mental examination by a physician or a licensed psychologist or to produce for examination the person in his custody or legal control. The order may be made only on motion for good cause shown and upon notice to the person to be examined and to all parties and shall specify the time, place, manner, conditions, and scope of the examination and the person or persons by whom it is to be made.

(b) Report of examining physician or psychologist.

(1) If requested by the party against whom an order is made under subsection (a) of this Code section or by the person examined, the party causing the examination to be made shall deliver to him a copy of a detailed written report of the examining physician or psychologist setting out his findings, including results of all tests made, diagnoses, and conclusions, together with like reports of all earlier examinations of the same condition.

(2) Any party shall be entitled, upon request, to receive from the party whose physical or mental condition is in issue, or who is in control of, or has legal custody of, a person whose physical or mental condition is in issue, a report of any and every examination, previously or thereafter made, of the condition in issue, unless, in the case of a report of examination of a person not a party, the party shows that he is unable to obtain it.

(3) The court, on motion, may make an order against a party requiring delivery of a report under paragraph (1) or (2) of this subsection on such terms as are just; and, if a physician or psychologist fails or refuses to make a report, the court may exclude his testimony if offered at the trial.

(4) By requesting and obtaining a report of the examination so ordered or by taking the deposition of the examiner, the party examined waives any privilege he may have in that action, or any other action involving the same controversy, regarding the testimony of every other person who has examined or may thereafter examine him in respect to the same mental or physical condition.

(5) Paragraphs (1) through (4) of this subsection apply to examinations made by agreement of the parties, unless the agreement expressly provides otherwise. Paragraphs (1) through (4) of this subsection do not preclude discovery of a report of an examining physician or psychologist or the taking of a deposition of the physician or psychologist in accordance with any other Code section of this chapter.