Okla. Admin. Code § 365:10-11-4
For the purpose of determining the applicability of and implementing the terms of this section of this Plan or any provision of similar purpose of any other Plan, the insurer or service plan may, without the consent of or notice to any person, release to or obtain from any other insurance company or other organization or person any information, with respect to any person, which the insurer or service plan deems to be necessary for such purposes. Any person claiming benefits under this plan shall furnish to the insurer or service plan such information as may be necessary to implement this section. Occasionally this will necessitate a carrier making payment as the primary carrier with a right of recovery in the event that subsequent investigation proves that payment as a secondary carrier should have been made.
Okla. Admin. Code § 365:10-11-4