The former Hudson Valley Hospital Center joined the NewYork-Presbyterian Healthcare System in January, following Lawrence Hospital in Bronxville in making NewYork-Presbyterian its parent organization and co-operator. The 128-bed hospital in northern Westchester has 1,300 employees. "Our affiliation with NewYork-Presbyterian will enable this already excellent hospital to become even better," John C. Federspiel, president of NewYork-Presbyterian/Hudson Valley Hospital, told some 60 hospital board members, donors, public officials and hospital employees at the hospital"™s Pataki Center. Dr.