Dr. James N. Karnegis is an expert in the field of Cardiology. He graduated from Northwestern University Feinberg School of Medicine. Northwestern University Feinberg School of Medicine has a rank of 19 in research and a 29 in primary care James N. Karnegis, MD is a published doctor as well. He has 33 publications published. The latest was: Serum creatinine as an independent predictor of coronary heart disease mortality in normotensive survivors of myocardial infarction. POSCH Group.