Ill. Admin. Code tit. 50, § 2028.30
a) A company shall develop and implement a confidentiality protocol to accommodate a reasonable request by a requestor to receive communications of claim-related information from the company by alternative means or at alternative locations if the requestor clearly states that disclosure of all or part of the information could endanger the insured. The confidentiality protocol shall provide that, except with the express consent of the requestor, the company shall not disclose to the policyholder:
2) the nature of the health care services provided;
1) a requestor making a request do so in writing;
c) The company's confidentiality protocol shall include written procedures to be followed by its employees, agents, representatives or other persons with whom the company contracts and who may have access to the information sought to be kept confidential. The written procedures shall include:
5) a system of internal control procedures, which the company shall review at least annually, to ensure the confidentiality of:
2) A company shall notify its employees, agents, representatives and other persons with whom the company contracts who have access to the information sought to be kept confidential that the company's protocol is to be followed for the specified insured, within three business days after:
f) Notification of Release of Information