Okla. Stat. tit. 15, § 784

As used in the Third Party Prescription Act, the term "third party prescription program" means any system of providing for the reimbursement of pharmaceutical goods and services under a contractual arrangement or agreement between a provider of such goods and services and another party who is not the consumer of those goods and services. Such programs may include, but not be limited to, insurance plans which provide coverage for prescription drugs or other pharmaceutical services.