California Code, Labor Code - LAB § 4064

(a) The employer shall be liable for the cost of each reasonable and necessary comprehensive medical-legal evaluation obtained by the employee pursuant to Sections 4060, 4061, and 4062. Each comprehensive medical-legal evaluation shall address all contested medical issues arising from all injuries reported on one or more claim forms, except medical treatment recommendations, which are subject to utilization review as provided by Section 4610, and objections to utilization review determinations, which are subject to independent medical review as provided by Section 4610.5.

(b) For injuries occurring on or after January 1, 2003, if an unrepresented employee obtains an attorney after the evaluation pursuant to subdivision (d) of Section 4061 or subdivision (b) of Section 4062 has been completed, the employee shall be entitled to the same reports at employer expense as an employee who has been represented from the time the dispute arose and those reports shall be admissible in any proceeding before the appeals board.

(c) Subject to Section 4906, if an employer files a declaration of readiness to proceed and the employee is unrepresented at the time the declaration of readiness to proceed is filed, the employer shall be liable for any attorney's fees incurred by the employee in connection with the declaration of readiness to proceed.

(d) The employer shall not be liable for the cost of any comprehensive medical evaluations obtained by the employee other than those authorized pursuant to Sections 4060, 4061, and 4062. However, no party is prohibited from obtaining any medical evaluation or consultation at the party's own expense. In no event shall an employer or employee be liable for an evaluation obtained in violation of subdivision (b) of Section 4060. All comprehensive medical evaluations obtained by any party shall be admissible in any proceeding before the appeals board except as provided in Section 4060,4061, 4062, 4062.1, or 4062.2.