Cal. Ins. Code § 10133.64

(a) A contract issued, amended, renewed, or delivered on or after January 1, 2012, by or on behalf of a health insurer and a licensed hospital or any other licensed health care facility owned by a licensed hospital to provide inpatient hospital services or ambulatory care services to policyholders and insureds of the insurer shall not contain any provision that restricts the ability of the health insurer to furnish information to policyholders or insureds concerning the cost range of procedures at the hospital or facility or the quality of services provided by the hospital or facility.

(c) A health insurer shall provide the hospital or facility an advance opportunity of at least 20 days to review the methodology and data developed and compiled by the health insurer, and used pursuant to subdivision (a), before cost or quality information is provided to policyholders or insureds, including material revisions or the addition of new information. At the time the health insurer provides a hospital or facility with the opportunity to review the methodology and data, it shall also notify the hospital or facility in writing of their opportunity to provide an Internet Web site link pursuant to subdivision (f).

(d) If the information proposed to be furnished to policyholders and insureds on the quality of services performed by a hospital or facility is data that the insurer has developed and compiled, the insurer shall utilize appropriate risk adjustment factors to account for different characteristics of the population, such as case mix, severity of patient’s condition, comorbidities, outlier episodes, and other factors to account for differences in the use of health care resources among hospitals and facilities.

“Individual hospitals may disagree with the methodology used to define the cost ranges, the cost data, or quality measures. Many factors may influence cost or quality, including, but not limited to, the cost of uninsured and charity care, the type and severity of procedures, the case mix of a hospital, special services such as trauma centers, burn units, medical and other educational programs, research, transplant services, technology, payer mix, and other factors affecting individual hospitals.”

A health insurer and a hospital shall not be precluded from mutually agreeing in writing to an alternative method of conveying this statement.

(f) If a hospital or facility chooses to provide an Internet Web site link where a response to the health insurer’s posting may be found, it shall do so in a timely manner in order to satisfy the requirements of this section. If a hospital or facility chooses to provide a response, an insurer shall post, in an easily identified manner, a prominent link to the hospital’s or facility’s Internet Web site where a response to the health insurer’s posting may be found. A health insurer and a hospital shall not be precluded from mutually agreeing in writing to an alternative method to convey a hospital’s response.