Prior to joining Mount Sinai, Dr. Gruscinska served as a physician at the Montefiore Medical Center, Beth Israel Medical Center, and St. John’s Episcopal Hospital, where she was also the Associate Program Director for their Internal Medicine Residency Program. She served as a Clinical Assistant Professor at SUNY Downstate Medical Center College of Medicine at that time. Dr. Gruscinska earned her medical degree at the Minsk Medical Institute in Belarus and completed her Internal Medical Residency at the St. John’s Episcopal Hospital in New York. She is board-certified in internal medicine and a Fellow of the American College of Physicians. She is fluent in Polish, Russian, and Lithuanian.