225 ILCS 90/19.5
All information collected by the Department in the course of an examination or investigation of a licensee or applicant, including, but not limited to, any complaint against a licensee filed with the Department and information collected to investigate any such complaint, shall be maintained for the confidential use of the Department and shall not be disclosed. The Department may not disclose the information to anyone other than law enforcement officials, other regulatory agencies that have an appropriate regulatory interest as determined by the Secretary of the Department, or a party presenting a lawful subpoena to the Department. Information and documents disclosed to a federal, State, county, or local law enforcement agency shall not be disclosed by the agency for any purpose to any other agency or person. A formal complaint filed by the Department against a licensee or applicant shall be a public record, except as otherwise prohibited by law.
225 ILCS 90/19.5