N.Y. Comp. Codes R. & Regs. tit. 14, § 593.6
(a) In order to receive reimbursement for the provision of community rehabilitation services to an individual, the provider of service must ensure that the individual has been authorized in writing by a physician, prior to or upon admission, to receive services as provided by the program. The written authorization must be retained as a part of the individual's case record. The physician's authorization must:
(b) Service authorizations which are renewed must be signed by a physician, physician assistant, or nurse practitioner in psychiatry. Service authorizations must be renewed as follows:
(d) Such plan shall be developed by the staff of the program, resident and any collateral identified for participation in planning, as appropriate. The service plan must be reviewed and signed by a qualified mental health staff person. The service plan development process should facilitate mutual agreement on a planned course of action which, at a minimum, identifies the following:
(f) The service plan shall be reviewed at least every three months with the initial review occurring three months from the date of admission. The review shall include participation of staff involved in the provision of community rehabilitation services to the resident, the resident and/or if appropriate and approved by the resident, the resident's family or other collateral. Such review shall include the following: