Cal. Ins. Code § 10176.9
No policy, contract, or agreement coming within the provisions of this article, issued, entered into or renewed on or after July 1, 1984, shall be deemed to contain any provision restricting the liability of the insurer or plan with respect to expenses solely because the expenses were incurred while the person insured was in a state hospital, if the policy, contract, or agreement would have paid for the services but for the fact that they were provided in a state hospital. Nothing in this section shall be deemed to require an insurer or plan to pay a state hospital for covered expenses incurred by an insured or covered individual at a rate or charge higher than the insurer or plan would pay for such services to a hospital with which the insurer or plan has entered a contract providing for alternative rates of payment or limiting payments for services secured by insureds or covered individuals.
Ca. Ins. Code § 10176.9