(a) It is unlawful to do any of the following:

1. (1) Make or cause to be made a knowingly false or fraudulent material statement or material representation for the purpose of obtaining or denying any compensation, as defined in Section 3207 of the Labor Code.
2. (2) Present or cause to be presented a knowingly false or fraudulent written or oral material statement in support of, or in opposition to, a claim for compensation for the purpose of obtaining or denying any compensation, as defined in Section 3207 of the Labor Code.
3. (3) Knowingly assist, abet, conspire with, or solicit a person in an unlawful act under this section.

4. (4) Make or cause to be made a knowingly false or fraudulent statement with regard to entitlement to benefits with the intent to discourage an injured worker from claiming benefits or pursuing a claim.

   For the purposes of this subdivision, “statement” includes, but is not limited to, a notice, proof of injury, bill for services, payment for services, hospital or doctor records, X-ray, test results, medical-legal expense as defined in Section 4620 of the Labor Code, other evidence of loss, injury, or expense, or payment.

5. (5) Make or cause to be made a knowingly false or fraudulent material statement or material representation for the purpose of obtaining or denying any of the benefits or reimbursement provided in the Return-to-Work Program established under Section 139.48 of the Labor Code.
6. (6) Make or cause to be made a knowingly false or fraudulent material statement or material representation for the purpose of discouraging an employer from claiming any of the benefits or reimbursement provided in the Return-to-Work Program established under Section 139.48 of the Labor Code.

(c) A person who violates subdivision (a) and who has a prior felony conviction of that subdivision, of former Section 556, of former Section 1871.1, or of Section 548 or 550 of the Penal Code, shall receive a two-year enhancement for each prior conviction in addition to the sentence provided in subdivision (b).

The existence of any fact that would subject a person to a penalty enhancement shall be alleged in the information or indictment and either admitted by the defendant in open court, or found to be true by the jury trying the issue of guilt or by the court where guilt is established by plea of guilty or nolo contendere or by trial by the court sitting without a jury.