Adequate guarantee of payment of the charges for hospitalization shall be required in each instance. This may consist of a statement of personal financial responsibility to be signed by the patient or a member of his family; or payment of charges incurred at the end of each treatment day in the case of outpatients; or financial coverage in appropriate form from another public agency, a recognized private or voluntary agency, or an insurance company.
N.Y. Comp. Codes R. & Regs. Tit. 10 §§ 88-1.10