Cal. Gov. Code § 22836

An employee enrolled in a health benefit plan who is removed or suspended without pay and later reinstated or restored to duty on the ground that the removal or suspension was unjustified, unwarranted, or illegal may not be deprived of coverage or benefits for the interim. Any contributions otherwise payable by the employer that were actually paid by the employee shall be restored to the same extent and effect as though the removal or suspension had not taken place, and any other equitable adjustments necessary and proper under the circumstances shall be made in premiums, claims, and other charges.