Sameer A Ansari

Dr. Sameer A Ansari, MD, PhD is a Professor of Radiology (Interventional Neuroradiology), Neurological Surgery, and Neurology at Northwestern University's Feinberg School of Medicine. He holds appointments in multiple departments reflecting his interdisciplinary expertise in neurovascular interventions and stroke care.

His educational background includes:

• MD from Jefferson Medical College, Thomas Jefferson University (2000)
• PhD from College of Graduate Studies, Thomas Jefferson University (2000)
• Radiology Residency at University of Illinois at Chicago (2005)
• Neuroradiology Fellowship at University of Michigan Health System (2006)
• Interventional Neuroradiology Fellowship at University of Michigan Health System (2008)

Dr. Ansari is board certified in both Neuroradiology and Diagnostic Radiology by the American Board of Radiology. His primary research interests focus on endovascular treatment of neurovascular diseases, particularly advanced MRI techniques to optimize patient selection for acute ischemic stroke interventions and intracranial atherosclerotic disease treatments. He has published extensively on stroke thrombectomy outcomes, intracranial aneurysm management, and neurointerventional oncology.

His recent publications (2025) demonstrate significant contributions across multiple domains including probabilistic modeling for stroke outcomes prediction, racial disparities in aneurysm treatment, novel approaches to medium vessel occlusion, and the emerging field of neurointerventional oncology. His work frequently leverages the NeuroVascular Quality Initiative-Quality Outcomes Database (NVQI-QOD) registry to generate real-world evidence.

Dr. Ansari maintains active leadership roles in professional societies:

• Scientific Exhibits Committee-Interventional, ASNR (2010-Present)
• Session Moderator-Adult Brain: Vascular, Intracranial, ASNR (2010-Present)
• AHA/ASA Abstract Grading Subcommittee, International Stroke Meeting (2010-Present)
• Presentation Award Committee-Interventional, ASNR (2010-Present)

His professional society memberships include the American Heart/Stroke Association, American Society of Neuroradiology, Society of Neurointerventional Surgery, American Roentgen Ray Society, American University Radiologists, American College of Radiology, and Radiological Society of North America. In 2024, he served on boards for the American Board of Radiology, American College of Radiology, American Heart Association, and multiple medical device companies including Boston Scientific, Medtronic, and MicroVention.

Dr. Ansari's clinical work focuses on the endovascular treatment of neurovascular diseases, with particular expertise in acute stroke intervention and complex cerebrovascular disorders. His research bridges clinical practice with advanced imaging techniques to improve patient outcomes in neurointerventional procedures.