California Code, Labor Code - LAB § 4621

(a) In accordance with the rules of practice and procedure of the appeals board, the employee, or the dependents of a deceased employee, shall be reimbursed for his or her medical-legal expenses and reasonably, actually, and necessarily incurred, except as provided in Section 4064. The reasonableness of, and necessity for, incurring these expenses shall be determined with respect to the time when the expenses were actually incurred.Costs for medical evaluations, diagnostic tests, and interpreters' services incidental to the production of a medical report shall not be incurred earlier than the date of receipt by the employer, the employer's insurance carrier, or, if represented, the attorney of record, of all reports and documents required by the administrative director incidental to the services. This subdivision is not applicable unless there has been compliance with Section 4620.

(b) Except as provided in subdivision (c) and Sections 4061 and 4062, no comprehensive medical-legal evaluations, except those at the request of an employer, shall be performed during the first 60 days after the notice of claim has been filed pursuant to Section 5401, and neither the employer nor the employee shall be liable for any expenses incurred for comprehensive medical-legal evaluations performed within the first 60 days after the notice of claim has been filed pursuant to Section 5401.

(c) Comprehensive medical-legal evaluations may be performed at any time after the claim form has been filed pursuant to Section 5401 if the employer has rejected the claim.

(d) Where, at the request of the employer, the employer's insurance carrier, the administrative director, the appeals board, or a referee, the employee submits to examination by a physician, he or she shall be entitled to receive, in addition to all other benefits herein provided, all reasonable expenses of transportation, meals, and lodging incident to reporting for the examination to the same extent and manner as provided for in Section 4600.