Iowa Code § 85A.24
The physicians designated in section 85A.20 shall file the report in triplicate with the workers' compensation commissioner who shall mail or deliver a certified copy of the report to the claimant and to the employer. The report shall become a part of the record of the case. The workers' compensation commissioner shall make the decision or award in the case based upon the entire record. The report of the physicians in any case may be returned by the commissioner to the physicians for reconsideration and further report. The physicians shall not be prohibited from testifying before the workers' compensation commissioner, board of arbitration, or any other person, commission, or court as to the results of the examination or the condition of any employee examined.
Iowa Code § 85A.24