Patient Portal. Pay Bill. Main navigation ... 322 Underhill Avenue, Yorktown Heights, NY 10598. Patient Office. 322 Underhill Avenue, 1st Floor, Yorktown, NY 10598 (914) 962-5501 Fax (914) 962-0799. Specialty Internal Medicine. Hospital Affiliation Northern Westchester Hospital. Education MD - New York Medical College. Residency New York ....