N.Y. Comp. Codes R. & Regs. tit. 14, § 599.4
(p) Designated mental illness means a disruption of normal cognitive, emotional, or behavioral functioning, which can be classified and diagnosed using the current edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM), other than:
(ar) Professional staff means practitioners possessing a license or a permit from the New York State Education Department who are qualified by credentials, training, and experience to provide direct services related to the treatment of mental illness and shall include the following:
(11) Psychiatrist is an individual who is currently licensed to practice medicine in New York State, who:
(az) Serious emotional disturbance means a child or adolescent has a designated mental illness diagnosis according to the most current Diagnostic and Statistical Manual of Mental Disorders (DSM) and has experienced functional limitations due to emotional disturbance over the past 12 months on a continuous or intermittent basis. The functional limitations must be moderate in at least two of the following areas or severe in at least one of the following areas:
For purposes of this Part: