Okla. Stat. tit. 85A, § 85A-56: Certified workplace medical plans

A. If the employer has previously contracted with a certified

workplace medical plan, the employer shall select for the injured

employee a treating physician or chiropractor from the physicians or

chiropractors listed within the network of the certified workplace

medical plan. The employee may apply for a change of physician or

chiropractor by utilizing the dispute resolution process set out in

the certified workplace medical plan on file with the State

Department of Health.

B. If the employer is not covered by a certified workplace

medical plan, the employer shall select the treating physician or

chiropractor. The Commission on application of the employee shall

order one change of treating physician or chiropractor. Upon the

Commission's granting of the application, the employer shall provide

a list of three physicians, one of which may be a chiropractor, from

whom the employee may select the replacement.