Whenever the Department conducts inspections and investigations in response to complaints received from the public, the identity of the complainant and the identity of any patient who is the subject of the complaint, or identified therein, shall be treated as confidential and shall not be open to inspection by members of the public. Nothing contained herein shall prevent the Department, in its discretion, from disclosing to the hospital the nature of the complaint or the identity of the patient who is the subject of the complaint. Nothing contained herein shall prevent the Department or its employees from making reports under § 63.2-1509 or Article 2 (§ 63.2-1603 et seq.) of Chapter 16 of Title 63.2. If the Department intends to rely, in whole or in part, on any statements made by the complainant, at any administrative hearing brought against the hospital, the Department shall disclose the identity of the complainant to the hospital in a reasonable time in advance of such hearing.