Okla. Stat. tit. 36, § 6556
Every health insurance plan which proposes to administer a health benefits program that provides for the coverage of hospital and/or medical benefits and the utilization review of those benefits shall:
2. Contract with a private review agent who is certified in accordance with the Hospital and Medical Services Utilization Review Act.
The provisions of this section shall not apply to insurance companies and not-for-profit hospital services and medical indemnity plans, licensed by the Commissioner to transact insurance in this state, that perform in-house utilization review.
Laws 1991, HB 1559, c. 294, § 6, eff. November 1, 1991.