N.Y. Comp. Codes R. & Regs. tit. 23, § 400.6
(2) If a non-participating physician or a non-participating hospital bills a patient for emergency services, including inpatient services that follow an emergency room visit, the non-participating physician or non-participating hospital shall provide a claim form and an assignment of benefits form to the patient.
(b)
(d) In disputes involving emergency services, including inpatient services that follow an emergency room visit, rendered by a non-participating hospital that had previously entered into a participating provider agreement with a health care plan, if the non-participating hospital believes that the initial payment amount paid pursuant to section 400.5(a)(1)(ii) of this Part by the health care plan is not reasonable, the non-participating hospital may submit a dispute to the superintendent for review by an IDRE, as provided in section 400.7 of this Part, and propose an amount it deems reasonable, provided that the non-participating hospital:
(a)