Okla. Stat. tit. 63, § 3131.10

If a person with a do-not-resuscitate consent or order is transferred from such person's home to the care of a health care agency or from the care of one health care agency to another health care agency, the existence of a do-not-resuscitate consent or order shall be communicated to the receiving health care agency prior to the transfer, and a copy of the written do-not-resuscitate consent or order shall accompany the person to the health care agency receiving the person and shall remain effective unless revoked as provided in Section 7 of this act.