(a) The office of inspector general shall employ a medical director who:
(1) is a licensed physician under Subtitle B, Title 3, Occupations Code, and the rules the Texas Medical Board adopts under that subtitle; and
(2) preferably has significant knowledge of Medicaid.
(b) The medical director shall ensure that any investigative findings based on medical necessity or the quality of medical care have been reviewed by a qualified expert as described by the Texas Rules of Evidence before the office of inspector general imposes a payment hold or seeks recoupment of an overpayment, damages, or penalties.