Okla. Admin. Code § 75:45-3-2
The following words or terms, when used in this subchapter, shall have the following meaning, unless the context clearly indicates otherwise:
"Act" means the Patient's Right to Pharmacy Choice Act.
"Pharmacy benefits management" means the administration and/or management of prescription drug benefits provided by a covered entity under the terms and conditions of the contract between the pharmacy benefits manager and the covered entity.
"Pharmacy benefits manager" or "PBM " means a person who performs pharmacy benefits management activities and any other person acting for such person under a contractual or employment relationship in the performance of pharmacy benefits management for a covered entity.
"Workers Compensation Pharmacy Benefits Manager" or "WCPBM" means a pharmacy benefit manager providing managed pharmacy care to workers' compensation claimants.
Okla. Admin. Code § 75:45-3-2