Cal. Health & Safety Code § 1373.12

A health care service plan which offers or provides one or more chiropractic services, as defined in Section 7 of the Chiropractic Initiative Act, as a specific chiropractic plan benefit, when those services are not provided pursuant to a contract as described in subdivision (a) of Section 1373.9, shall not refuse to give reasonable consideration to affiliation with chiropractors for provision of services solely on the basis that they are chiropractors. Section 1390 shall not apply to this section.