Okla. Stat. tit. 85A, § 85A-93: Investigation

On its own initiative at any time that compensation payments are

being made without an award, the Workers' Compensation Commission

may, and in any case if the right to compensation has been

controverted, if payments of compensation have been suspended, or if

an employer seeks to suspend payments made under an award, or on

application of an interested party, the Commission shall make such

investigation, cause such medical examination to be made, hold such

hearings, and take such further action as the Commission deems

proper for the protection of the rights of all parties.