California Code, Health and Safety Code - HSC § 1380.2

(a)(1) Notwithstanding any other law, except as provided in Section 1374.197, on and after January 1, 2028, a full service health care service plan or its delegate shall subscribe to and use the most recent version of the Council for Affordable Quality Healthcare (CAQH) credentialing form, and shall comply with the CAQH credentialing processes.

(2) A full service health care service plan or its delegate shall only request additional information from a provider to clarify and confirm information that is provided on the CAQH credentialing form, including verification of information not specifically disclosed on the provider's application.  The provider shall respond to the request within 10 business days.  A health care service plan or its delegate shall minimize the number of requests for additional information from providers.  A provider shall submit their credentialing form and maintain their credentialing information in the CAQH database in a manner consistent with CAQH standards.