N.Y. C.P.L.R. § 306-C
In the case of an individual who has suffered personal injuries and has received medical assistance pursuant to titles eleven and eleven-D of article five of the social services law on or after the date of such injury, notice of the commencement of an action by or on behalf of such individual for such personal injuries shall be sent to the social services district in the county in which such recipient resides, or to the department of health, by certified mail, return receipt requested, or electronically in accord with regulations promulgated by the commissioner of the department of health, within sixty days of the completion of service upon all parties to such action. Proof of sending such notice shall be filed with the court in accordance with rulethree hundred six of this article. Sending such notice shall not be a jurisdictional requirement to commencing an action.
N.Y. CPLR 306-C