Claims of attorneys and claims for medical services and for medicine and related benefits shall be subject to approval by the commission; provided however, that fees for physician services shall be set using relative value units from the current year resource based relative value system (RBRVS) as it is modified from time to time, multiplied by conversion factors to be determined by the commission in rule. Factors will be set for, at least, the following CPT code areas: medicine, surgery, physical medicine, radiology, anesthesia and pathology. The commission shall adopt rules for the annual adjustment of medical reimbursements. In cases where RBRVS units are not available or have no relation to industrial claims, relative value units for fees for physician services shall be determined by the commission.