Her area of clinical expertise is pediatric emergency medicine.Dr. Katznelson received her M.D. from the State University of New York at Stony Brook School of Medicine in 1997. She completed a residency in pediatrics at the Children’s National Medical Center in 2000, and a fellowship in pediatric emergency medicine at the New York University School of Medicine in 2003.She holds a certification in pediatrics from the American Board of Pediatrics.