California Code, Insurance Code - INS § 10110.9

(a) Notwithstanding any other law, except as provided in Section 10144.56, on and after January 1, 2028, a health insurer 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.

(b) A health insurer 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 insurer 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.