Labor Code – LAB § 4903.5
(a) A lien claim for expenses as provided in subdivision (b) of Section 4903 shall not be filed after three years from the date the services were provided, nor more than 18 months after the date the services were provided, if the services were provided on or after July 1, 2013.
(b) Notwithstanding subdivision (a), any health care service plan licensed pursuant to Section 1349 of the Health * * * and Safety Code , group disability insurer under a policy issued in this state pursuant to the provisions of Section 10270.5 of the Insurance Code , self- insured employee welfare benefit plan issued in this state as defined in Section 10121 of the Insurance Code , Taft-Hartley health and welfare fund, or publicly funded program providing medical benefits on a nonindustrial basis, may file a lien claim for expenses as provided in subdivision (b) of Section 4903 within 12 months after the entity first knew or in the exercise of reasonable diligence should have known that an industrial injury is being claimed, but in no event later than five years from the date the services were provided to the employee.
(c) The injured worker shall not be liable for any underlying obligation if a lien claim has not been filed and served within the allowable period. Except when the lien claimant is the applicant as provided in Section 5501 or as otherwise permitted by rules of practice and procedure adopted by the appeals board, a lien claimant shall not file a declaration of readiness to proceed in any case until the case-in-chief has been resolved.
(d) This section shall not apply to civil actions brought under the Cartwright Act (Chapter 2 (commencing with Section 16700 ) of Part 2 of Division 7 of the Business and Professions Code), the Unfair Practices Act (Chapter 4 (commencing with Section 17000 ) of Part 2 of Division 7 of the Business and Professions Code), or the federal Racketeer Influenced and Corrupt Organization Act (Chapter 96 (commencing with Section 1961 ) of Title 18 of the United States Code) based on concerted action with other insurers that are not parties to the case in which the lien or claim is filed.