N.Y. Comp. Codes R. & Regs. tit. 10, § 98-2.13
(b) All external appeal case records shall be subject to audit and examination for a period of six years from the date of the certified external appeal agent's final determination on the appeal. All documentation relating to the case shall be kept and maintained by the certified external appeal agent for no less than six years from the date of the certified external appeal agent's final determination on the appeal. Such documentation shall include, but not be limited to:
(d) All external appeal case records shall be subject to audit and examination for a period of six years from the date of the certified external appeal agent's final determination on the appeal. All documentation relating to the case shall be kept and maintained by the health care plan for no less than six years from the date of the certified external appeal agent's final determination on the appeal. Such documentation shall include, but not be limited to: