California Code, Insurance Code - INS § 10181.7

(b)(1) The contracted rates between a health insurer and a provider shall be deemed confidential information that shall not be made public by the department and are exempt from disclosure under the California Public Records Act (Division 10 (commencing with Section 7920.000) of Title 1 of the Government Code).  The contracted rates between a health insurer and a provider shall not be disclosed by a health insurer to a large group purchaser that receives information pursuant to Section 10181.10.

(2) The contracted rates between a health insurer, including those submitted to the department pursuant to Section 10181.31, and a large group shall be deemed confidential information that shall not be made public by the department and are exempt from disclosure under the California Public Records Act (Division 10 (commencing with Section 7920.000) of Title 1 of the Government Code).  Information provided to a large group purchaser pursuant to Section 10181.10 shall be deemed confidential information that shall not be made public by the department and shall be exempt from disclosure under the California Public Records Act (Division 10 (commencing with Section 7920.000) of Title 1 of the Government Code).

(1) Justifications for any unreasonable rate increases, including all information and supporting documentation as to why the rate increase is justified.

(2) An insurer's overall annual medical trend factor assumptions in each rate filing for all benefits.

(3) An insurer's actual costs, by aggregate benefit category to include, hospital inpatient, hospital outpatient, physician services, prescription drugs and other ancillary services, laboratory, and radiology.

(4) The amount of the projected trend attributable to the use of services, price inflation, or fees and risk for annual policy trends by aggregate benefit category, such as hospital inpatient, hospital outpatient, physician services, prescription drugs and other ancillary services, laboratory, and radiology.