She is affiliated with Mount Sinai Hospital. Dr. Klein graduated from SUNY Downstate Medical Center College of Medicine and then she performed her residency at a hospital affiliated with New York University (NYU). Blue Cross/Blue Shield, Healthfirst, and Aetna Medicare are among the insurance carriers that Dr. Klein honors. Distinctions awarded to Dr. Klein include: Best Doctors-New York Magazine; RUBYFRUIT recognition of outstanding work and dedication in BREAST ONCOLOGY; and U.S. Army Corps of Engineers, Commander's Certificate of Appreciation.