Dr. John Grehan graduated from University of Minnesota Medical School in 1995.
Dr. Grehan has one office in Minnesota where he specializes in Cardiac Surgery and Thoracic Surgery. Learn more.
Dr. Grehan works with thirty-two doctors including Dr. Mark Erhard and Dr. Jeffrey Olson.
Dr. John Grehan is a cardiac surgeon specializing in the surgical treatment of heart and cardiovascular disorders. These could include atherosclerosis, endocarditis, valvular, or congenital heart disease, rheumatic, and ischemic. Dr. Grehan may perform operations including heart transplant surgery, coronary artery bypass, surgical implantation of pacemakers and defibrillators, or heart valve repair.
Following rigorous and lengthy training, thoracic surgeons are uniquely qualified to perform complex surgeries on the chest, or thorax as it is sometimes called. Their focus is usually on the lungs, esophagus, and other areas of the chest, and may also include the heart. As such, Dr. Grehan may see patients in Minnesota for a wide range of surgeries, for example removing cancer causing tumors from the esophagus and chest wall, or even a lung transplant.
University of Minnesota Medical School
MD • 1995
Please Note: The information displayed below is sourced from the 2014 Medicare Physician and Other Supplier National Provider Identifier (NPI) Aggregate Report. It's important to remember that the statistics below are not inclusive of all patients treated by Dr. Grehan, but only those who participate in Medicare.