N.Y. Comp. Codes R. & Regs. tit. 10, § 400.4
(a) Contracts to perform any services for a medical facility issued an operating certificate or certificate of approval shall:
(b) Medical facilities are hereby authorized, subject to the provisions of this Chapter, to enter into contracts and make arrangements among themselves and among other municipal, State, Federal or privately owned hospitals, or any medical schools, or other health-related facilities having or utilizing hospital services or facilities, whether or not located in this State or elsewhere, for the: