California Welfare And Institutions Code Section 10022

(a) Each publicly funded health care program that furnishes or pays for health care items or services under this division to a person having private health care coverage shall be entitled to be subrogated to the rights that person has against the carrier of the coverage to the extent of the health care items provided or services rendered. (b) An entity providing private health care coverage, as defined in paragraph (2) of subdivision (b) of Section 10020, shall do all of the following: (1) Accept the state`s right of recovery and the assignment to the state of any right of an individual or other entity to payment from the party for an item or service for which payment has been made under the state plan. (2) Respond to any inquiry by the state regarding a claim for payment for any health care item or service that is submitted not later than three years after the date of the provision of that health care item or service. (3) Agree not to deny a claim submitted by the state solely on the basis of the date of submission of the claim, the type or format of the claim form, or a failure to present proper documentation at the point-of-sale that is the basis of the claim if both of the following occur: (A) The claim is submitted by the state within the three-year period beginning on the date on which the item or service was furnished. (B) Any action by the state to enforce its rights with respect to that claim is commenced within six years of the state`s submission of the claim.