N.Y. Comp. Codes R. & Regs. tit. 10, § 86-1.3
(a) Medical facilities shall maintain their records in accordance with:
(1) Accounting and reporting. Hospitals shall maintain their accounts and records in accordance with the Healthcare Financial Management Association's (HFMA) Introduction to Hospital Accounting, 5th edition, written by Michael Nowicki and published by the Health Administration Press. Such accounts and records are to be maintained on an accrual basis except where an alternate system is mandated by law. Hospitals shall also submit to the department or its authorized agent a certified institutional cost report within five months after the close of each hospital's fiscal year. The data shall be reported as follows:
(i) In accordance with the policies and instructions in the following: