The authority of an employer or carrier to authorize the services of a specialist in excess of a fee of $1,000 applies only to the necessity for such services, but the choice of such specialist is entirely the choice of the injured worker, unless the employer or carrier has a contract with a diagnostic testing network or networks, requires an injured worker to utilize a provider or facility affiliated with such diagnostic testing network or networks and has furnished the notification required by section 325-7.5(d) of this Part.
N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 325-1.5