California Code, Health and Safety Code - HSC § 1348.6

(a) No contract between a health care service plan and a physician, physician group, or other licensed health care practitioner shall contain any incentive plan that includes specific payment made directly, in any type or form, to a physician, physician group, or other licensed health care practitioner as an inducement to deny, reduce, limit, or delay specific, medically necessary, and appropriate services provided with respect to a specific enrollee or groups of enrollees with similar medical conditions.

(b) Nothing in this section shall be construed to prohibit contracts that contain incentive plans that involve general payments, such as capitation payments, or shared-risk arrangements that are not tied to specific medical decisions involving specific enrollees or groups of enrollees with similar medical conditions. The payments rendered or to be rendered to physicians, physician groups, or other licensed health care practitioners under these arrangements shall be deemed confidential information in accordance with subdivision (d) of Section 1351.