(a) The board of trustees shall designate a medical board composed of three physicians.
(b) To be eligible to serve as a member of the medical board, a physician must be licensed to practice medicine in the state and be of good standing in the medical profession. A physician who is eligible to participate in the retirement system may not be a member of the medical board.
(c) The medical board shall:
(1) review all medical examinations required by this subtitle and Subtitle D;
(2) investigate essential statements and certificates made by or on behalf of a member of the retirement system in connection with an application for disability retirement; and
(3) report in writing to the executive director its conclusions and recommendations on all matters referred to it.
(d) The medical board is not subject to subpoena regarding findings it makes in assisting the executive director under this section, and its members may not be held liable for any opinions, conclusions, or recommendations made under this section.