About
Dr. Gary Parenteau, MD, is a thoracic surgeon specializing in cardiothoracic and vascular surgery. He provides comprehensive surgical care for conditions affecting the heart, lungs, chest, and major blood vessels, combining meticulous operative technique with a focus on patient safety and clear communication throughout the care journey. With approximately four decades of clinical experience, Dr. Parenteau is recognized for his depth of expertise in complex thoracic and cardiac surgical care.
He earned his medical degree from the University of Michigan Medical School and is board certified by the American Board of Thoracic Surgery in thoracic and cardiac surgery. Dr. Parenteau is affiliated with Mercy Health Saint Rita’s Medical Center in Lima, Ohio, and Blanchard Valley Hospital in Findlay, Ohio, where he collaborates with multidisciplinary teams to support coordinated evaluation, surgical treatment, and postoperative recovery.
Dr. Parenteau is licensed to practice medicine in Ohio and has previously held medical licenses in Michigan, West Virginia, and Maryland. He speaks English and is committed to helping patients and families understand their diagnosis, treatment options, and expected outcomes so they can make informed decisions with confidence.