He is affiliated with UPMC St. Margaret. Before completing his residency at the University of Pittsburgh Medical Center (UPMC), Dr. Vayonis attended medical school at Penn State College of Medicine. Patients rated Dr. Vayonis highly, giving him an average of 5.0 stars out of 5. United Healthcare Platinum, United Healthcare Compass, and United Healthcare Navigate are among the insurance carriers that Dr. Vayonis accepts.