Dr Janet Prystowsky Published March 21, 2018 at 164 × 242 in What is Dandruff and What Can I Do About It? Dr. Prystowsky Dr. Janet Prystowsky, MD Dr. Prystowsky is a leading board-certified dermatologist in New York City. In addition to her private practice, Dr. Prystowsky is a senior attending physician at Mount Sinai Roosevelt/St. Luke’s Medical Center.