Okla. Stat. tit. 63 § 1-2604
No individual policy of accident and health insurance issued which provides coverage for prescription drugs, nor any group blanket policy of accident and health insurance issued which provides coverage for prescription drugs shall exclude coverage of prescription drugs for cancer treatment or the study of oncology because the off-label use of such prescription drug has not been approved by the Federal Food and Drug Administration for that indication in one of the standard reference compendia, as defined in paragraph (d) of Section 1-1401 of Title 63 of the Oklahoma Statutes.
Any coverage of a prescription drug required by this section shall also include provisions for coverage of medically necessary services associated with the administration of the prescription drug.
Nothing in this section shall be construed as altering existing law with regard to provisions limiting the coverage of prescription drugs that have not been approved by the Federal Food and Drug Administration.
Okla. Stat. tit. 63, § 1-2604