Medical disputes not otherwise addressed by this Subchapter, including, but not limited to, matters of medical necessity or appropriateness, requests by an injured employee for a refund or reimbursement for health care paid by the employee, and requests initiated by the employer or insurance carrier pursuant to 85A O.S., § 55 for a determination of the reasonableness of charges for appropriate and necessary medical services and supplies rendered to an injured employee with a compensable work-related injury, may be addressed by filing a request for hearing before an administrative law judge of the Commission as provided in 810:10-5-16, by mediation, or by agreement of the parties, as appropriate.
Okla. Admin. Code § 810:15-15-4