Dr Dimitrios Koudoumas, MD PhD: Cardiothoracic, Thoracic & Vascular Surgery in Great Falls, MT

Dimitrios Koudoumas, MD PhD at Benefis Health System: Cardiovascular Health & Coronary Care

Dimitrios Koudoumas, MD PhD practices at Benefis Health System in Great Falls, a regional medical center and hospital campus serving north-central Montana. The Benefis Health campus at 1101 26th St S and the office at Medical Office Building 11, 1300 28th St S give patients convenient access to cardiac and vascular specialists. Dr Dimitrios Koudoumas is accepting new patients, and he holds a 5 out of 5 patient satisfaction rating for his compassionate, unhurried approach to care.

As a physician dedicated to cardiovascular health, Dimitrios works closely with cardiologists, primary care providers, family nurse practitioners and cardiac rehabilitation teams so that every patient receives coordinated coronary care. Koudoumas speaks fluent English and Greek, and his Greek heritage shapes a warm, family-centered style of medicine. From the first appointment through recovery, Dimitrios Koudoumas keeps patients and families informed at every step of diagnosis, treatment and follow-up.

Cardiac & Vascular Surgery Specialties of Dr Dimitrios Koudoumas

Dimitrios Koudoumas: Coronary Artery Bypass & Aortic Aneurysm Repair

Dr. Dimitrios G. Koudoumas is a cardiothoracic and vascular surgeon whose work centers on restoring circulation, preventing life‑threatening complications, and helping patients return to active, healthy lives. Coronary artery revascularization remains a core focus of his practice, where he performs coronary artery bypass surgery to reroute blood flow around blocked arteries and reduce the risk of heart attack. His experience spans the modern era of structural heart innovation, including advanced aortic valve therapies such as TAVR, allowing patients to benefit from less invasive approaches with faster recovery.

Beyond cardiac surgery, Dr. Koudoumas is deeply experienced in the treatment of aneurysmal disease across the thoracic aorta, abdominal aorta, and the cerebrovascular system. He manages thoracic and abdominal aortic aneurysms, aortic dissections, and complex aortic pathology using both open and endovascular strategies tailored to each patient’s anatomy and medical condition. His approach reflects contemporary evidence showing that aneurysm management requires balancing rupture risk, aneurysm morphology, patient age, and comorbidities — ensuring every patient receives a personalized, data‑driven treatment plan.

Dr. Koudoumas also treats intracranial aneurysms, offering patients access to the same advanced techniques used in leading neurovascular centers. Drawing on modern principles of aneurysm care, he utilizes microsurgical clipping, endovascular coiling, stent‑assisted techniques, and flow‑diversion strategies for wide‑neck or complex aneurysms. These approaches mirror the current standard described in the Stanford report, where rapid diagnosis, early aneurysm securing, and meticulous perioperative care significantly reduce the risk of rebleeding and improve neurological outcomes. He incorporates advanced imaging, intraoperative vessel assessment, and evidence‑based protocols — including vasospasm monitoring and nimodipine therapy — to support brain protection and long‑term durability of aneurysm repair.

Patients trust Dr. Koudoumas for his ability to manage the full spectrum of aneurysmal disease with precision, compassion, and a multidisciplinary mindset. Whether treating a life‑threatening ruptured intracranial aneurysm, a growing abdominal aortic aneurysm, or a complex coronary blockage, he brings together surgical expertise, modern endovascular technology, and patient‑centered care. His commitment is simple: to provide the safest, most effective treatment available — and to guide every patient through their recovery with clarity, confidence, and unwavering support.

Carotid Stent, Stroke & Peripheral Vascular Disease

Vascular surgery is the second pillar of the Koudoumas practice. Dr Dimitrios Koudoumas performs carotid revascularization, including carotid stent procedures, to lower stroke risk in patients with carotid artery disease. Dimitrios Koudoumas also treats peripheral vascular disease (PVD), creates arteriovenous fistula access for dialysis patients, and offers endovascular and minimally invasive options when appropriate. As a vascular surgeon trained in both open surgery and endovascular techniques, Koudoumas tailors each treatment plan to the individual patient.

Education & Training of Dimitrios Koudoumas, MD PhD

University at Buffalo & Brigham and Women's Hospital Training

Dimitrios Koudoumas earned his MD from the National and Kapodistrian University of Athens in Greece, followed by a PhD for cardiovascular research. Dimitrios completed a cardiac ICU fellowship at Brigham and Women's Hospital and Harvard Medical School in Boston, then general surgery training at Brigham and Women's Hospital and SUNY Stony Brook. Dr Dimitrios Koudoumas went on to the Vascular Surgery Integrated Residency at the University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, training at Buffalo General Hospital.

University of Utah Cardiothoracic Surgery Fellowship

Koudoumas then completed a Cardiothoracic Surgery Fellowship, Cardiac Track, at the University of Utah. This MD PhD pathway, combined with peer-reviewed publications, board certification in thoracic surgery, ongoing CME, active licensure and clinical trial experience, keeps Dimitrios Koudoumas at the leading edge of cardiac and vascular care. Dimitrios brings the latest research and guidelines into everyday patient care.

Visit Koudoumas Cardiothoracic & Vascular Surgery in Great Falls, MT 59405