He graduated from Columbia University in 1987 and went on to do a general practice residency at the Bronx V.A. Until recently, Dr. Keren had a very successful private practice on Central Park South in NYC for 21 years. He completed a 2 year orthodontic program for general dentists. He is the former director of Columbia's prestigious faculty practice. Dr. Keren is a Schreiber High School alumnus (class of 79) and is a resident of Port Washington since 1975. more...