N.Y. Comp. Codes R. & Regs. tit. 12, § 325-7.4
(a) To the extent permitted by law, diagnostic testing networks and affiliated network providers shall be authorized to:
(3) process, pay, and raise any objections to bills for diagnostic examinations and tests.
(b)
(2) In any claim controverted by the insurance carrier pursuant to Workers' Compensation Law section 25(2), where the insurance carrier will not reimburse the diagnostic testing network, or other party for diagnostic examinations and tests administered to the claimant until the controversy is resolved and the claim established, including under the provisions of Workers' Compensation Law section 21-a, the insurance carrier shall provide notice of this decision to the claimant with the notice that the right to compensation is controverted. Such notice shall be in the form prescribed by the chair, and shall state that the insurance carrier does not intend to reimburse any designated diagnostic testing network or affiliated network provider while the claim is controverted and until it is established, and the claimant may elect to use a diagnostic examination and testing facility not designated pursuant to this Part during the period that the claim is controverted. In the event the claimant prevails on his or her claim, the insurance carrier shall reimburse either: