Cal. Civ. Code § 56.31

Notwithstanding any other provision of law, nothing in subdivision (f) of Section 56.30 shall permit the disclosure or use of medical information regarding whether a patient is infected with or exposed to the human immunodeficiency virus without the prior authorization from the patient unless the patient is an injured worker claiming to be infected with or exposed to the human immunodeficiency virus through an exposure incident arising out of and in the course of employment.