Dr. Papaioannou attended medical school at St. George's University School of Medicine. Her patients gave her an average rating of 5.0 out of 5 stars. Amerigroup, Blue Cross/Blue Shield, and Empire BlueCross BlueShield are among the insurance carriers that Dr. Papaioannou honors. She is conversant in Greek. Her hospital/clinic affiliations include North Shore University Hospital (NSUH), Northwell Health Neuroscience Institute, and Long Island Jewish Medical Center (LIJMC).