Mount Sinai Beth Israel has recruited world-class specialists to combine medical expertise with clinical innovation.


  • Elizabeth Sellman, MPA, President and Chief Operating Officer, MSBI and Downtown
  • Derek Mazique, MD, Chief Medical Officer, MSBI and New York Eye and Ear Infirmary of Mount Sinai
  • Christine D. Mahoney, MS, RN, CCRN, AGACNP-BC, Senior Vice President and Chief Nursing Officer
  • Christopher Berner, Vice President, Human Resources 
  • Kelly Cassano, MD, Vice President and Chief, Ambulatory Care, Associate Dean for Clinical Affairs
  • Donald Kastenbaum, MD, Physician-in-Chief, Vice President and Medical Director Peri-Operative Services, Vice Chair Orthopedics