Medical Group Westchester NewYork-Presbyterian Medical Group Westchester 540 Gramatan Avenue Call for an Appointment Find a doctor at this location Opens in Google Maps 540 Gramatan Avenue Mount Vernon, NY 10552 Opens in Google Maps Directions Contact 914-668-5944 Main For department phone numbers please see Contact Us. SpecialtiesGastroenterologyGeneral SurgeryInfectious DiseaseInternal MedicineMedical Oncology Our Doctors Gastroenterology Joshua Hartman, MD David Kauvar, MD General Surgery Miguel Silva, MD Infectious Disease Yolima Salazar, MD Jonathan Kirschner, MD Internal Medicine Valneo Buttari, MDJaleh Farahani, MDEkaterina Milchtein, MDIfesinachi C Nnaji, MD Medical Oncology Anthony Provenzano, MD Our Facility Use the left and right arrow keys to navigate the gallery Contact Us Medical Group Westchester 540 Gramatan Avenue, Mount Vernon, NY 10552 Opens in Google Maps 914-668-5944 Main