Cal. Health and Safety Code § 1367.45

(a) Every individual or group health care service plan contract that is issued, amended, or renewed on or after January 1, 2002, that covers hospital, medical, or surgery expenses shall provide coverage for a vaccine for acquired immune deficiency syndrome (AIDS) that is approved for marketing by the federal Food and Drug Administration and that is recommended by the United States Public Health Service. (b) This section may not be construed to require a health care service plan to provide coverage for any clinical trials relating to an AIDS vaccine or for any AIDS vaccine that has been approved by the federal Food and Drug Administration in the form of an investigational new drug application. (c) A health care service plan that contracts directly with an individual provider or provider organization may not delegate the risk adjusted treatment cost of providing services under this section unless the requirements of Section 1375.5 are met. (d) Nothing in this section is to be construed in any manner to limit or impede a health care service plan’s power or responsibility to negotiate the most cost-effective price for vaccine purchases. (e) Nothing in this section shall be construed to deny or restrict in any way the department’s authority to ensure plan compliance with this chapter when a plan provides coverage for prescription drugs.