Okla. Stat. tit. 36, § 36-4503: Direct payment of hospital, medical services

Any group accident and health policy may provide that subject to

any written direction of the insured in the application or

otherwise, all or any portion of any indemnities provided by any

such policy on account of hospital, nursing, medical or surgical

services may, at the insurer's option, and unless the insured

requests otherwise not later than the time of filing proofs of such

loss, be paid directly to the hospital or person rendering such

services; but the policy may not require that the service be

rendered by a particular hospital or person. Payments so made shall

discharge the insurer's obligation with respect to the amount of

insurance so paid.