Okla. Stat. tit. 74, § 1325

The Oklahoma Health Care Authority shall schedule a hearing thirty (30) days prior to adopting any major change in the reimbursement rates or methodology. The Authority shall notify health care providers who provide services pursuant to a contract with the Authority at least fifteen (15) days prior to the hearing. The notice shall include proposed changes to the reimbursement rates or methodology. The Authority shall also inform such health care providers at the hearing of any proposed changes to the reimbursement rates or methodology. At the hearing the Authority shall provide an open forum for such health care providers to comment on the proposed changes.