Cal. Civ. Code § 3045.4
Any person, firm, or corporation, including, but not limited to, an insurance carrier, making any payment to the injured person, or to his or her attorney, heirs, or legal representative, for the injuries he or she sustained, after the receipt of the notice as provided by Section 3045.3, without paying to the association, corporation, public entity, or other institution or body maintaining the hospital the amount of its lien claimed in the notice, or so much thereof as can be satisfied out of 50 percent of the moneys due under any final judgment, compromise, or settlement agreement after paying any prior liens shall be liable to the person, partnership, association, corporation, public entity, or other institution or body maintaining the hospital for the amount of its lien claimed in the notice which the hospital was entitled to receive as payment for the medical care and services rendered to the injured person.
Ca. Civ. Code § 3045.4