Okla. Admin. Code § 810:10-3-4
All workers' compensation issues may be mediated except for disputes related to medical care under a certified workplace medical plan or claims against the Multiple Injury Trust Fund. Mediation shall be voluntary, informal, nonbinding (unless the parties enter into a settlement agreement) and strictly confidential. If an agreement is not reached, the results and statements made during the mediation are not admissible in any following proceeding except as provided in 810:10-3-10. Mediation may be by mutual agreement of the parties to a workers' compensation dispute or pursuant to a referral order by the assigned Administrative Law Judge as provided in 85A O.S. § 110(E) following the filing of a request for administrative hearing and assent of the parties to mediate. Parties may waive mediation and proceed directly to an administrative hearing. General information about mediation in workers' compensation may be obtained from the Commission's Counselor Division.
Okla. Admin. Code § 810:10-3-4