Tex. Occ. Code § 604.175
A complaint, adverse report, investigation file, other report, or other investigative information in the possession of or received or gathered by the advisory board, the medical board, or an employee or agent of the medical board relating to a certificate or temporary permit holder, an application for a certificate or temporary permit, or a criminal investigation or proceeding is privileged and confidential and is not subject to discovery, subpoena, or other means of legal compulsion for release to any person other than the advisory board, the medical board, or an employee or agent of the advisory board or medical board involved in discipline under this chapter. For purposes of this section, "investigative information" includes information related to the identity of a person performing or supervising compliance monitoring for the advisory board or medical board and a report prepared by the person related to compliance monitoring.
Tex. Occ. Code § 604.175