Northwest Health Brings Cardiothoracic Surgeon to Region
5/5/2025
Northwest Health welcomes cardiothoracic surgeon Sinan Simsir, M.D., to Northwest Medical Group. With more than 20 years of experience in treating complex heart and lung conditions, Dr. Simsir brings advanced surgical knowledge and a patient-centered approach to the region. He joined Northwest Medical Group - Cardiothoracic Surgery office located at 85 E. U.S. Highway 6, Suite 310, in Valparaiso.
Dr. Simsir’s experience includes the use of ventricular assist devices (VAD), mitral valve repair, repair of aortic dissections, and other open heart surgery. He has held leadership roles in lung and heart transplant and advanced heart failure programs at several well-established cardiothoracic centers across the country, including Cedars-Sinai Medical Center in Los Angeles, and Advocate Christ Medical Center in Oak Lawn.
A pioneer in advanced cardiothoracic care and having founded lifesaving programs at leading medical centers across the country, Simsir brings a wealth of experience to the region. At Cedars-Sinai Medical Center, Dr. Simsir founded the VAD program that provides critical support for patients with advanced heart failure. He also served as the founding surgical director of the lung transplantation program at Advocate Christ Medical Center and the VAD program at Jersey Shore University Medical Center in Neptune N.J. He founded the ECMO (extracorporeal membrane oxygenation) programs at Jersey Shore University Medical Center and Riverside Medical Center in Kankakee as well.
“Dr. Simsir’s arrival marks an exciting advancement in cardiothoracic care in our region,” Northwest Health - Porter CEO James Leonard, DO, FACEP, said. “His extensive experience, leadership in growing lifesaving programs and dedication to patient-centered care will be an incredible asset to our community.”
Dr. Simsir pursued his medical education at Marmara University in Istanbul, Turkey, before completing residencies in cardiothoracic surgery at the University of Massachusetts Hospital and General Surgery at the University of Minnesota. Dr. Simsir also trained as a fellow in thoracic transplantation and VAD and was an assistant professor at Duke University Medical Center. He is board-certified by the American Board of Thoracic Surgery.
Known for his clear communication and compassionate care, Dr. Simsir takes time to explain procedures in a way patients can understand, earning the trust of both patients and their families. Dr. Simsir treats heart valve disorders, aortic aneurysms, coronary artery disease, heart failure, congenital heart defects, lung cancer, lung disease/disorders, pleural disease, pneumothorax, mediastinal tumors, and chest wall tumors.
To schedule a consultation with Dr. Simsir, call 219-983-6380.
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