Sameer Ansari

Sameer A. Ansari, MD, PhD is an interventional neuroradiologist/neurointerventional surgeon at Northwestern Memorial Hospital in the Departments of Radiology, Neurology and Neurological Surgery, Northwestern University Feinberg School of Medicine. 

Dr. Ansari received his medical and doctoral degrees from Jefferson Medical College, Philadelphia, completed his Diagnostic Radiology residency at the University of Illinois, Chicago, and Diagnostic/Interventional Neuroradiology fellowships at the University of Michigan, Ann Arbor. Following faculty positions at the University of Michigan and University of Chicago as Director of the Neurointerventional Surgery program, he transitioned to Northwestern University in 2010 and is currently Professor and Section Chief of Interventional Neuroradiology. 

Dr. Ansari specializes in minimally invasive percutaneous and endovascular procedures of the brain, head/neck and spine. His clinical and basic science research interests are predominantly centered on MR imaging based patient selection to stratify the risk of various neurovascular pathologies, particularly the molecular pathogenesis and inflammation imaging of intracranial atherosclerotic disease and intracranial aneurysms. Other clinical research interests have investigated the safety and efficacy of acute ischemic stroke thrombectomy, coated coils in the embolization of intracranial aneurysms, the role of intracranial stents in the treatment of distal cervical/intracranial dissections, quantitative 4D flow and functional MRI techniques in the assessment of cerebral aneurysms and arteriovenous malformations. 

Dr. Ansari is a nationally recognized academic interventional neuroradiologist and physician-scientist. He has published > 150 peer reviewed scientific papers, national guidelines, reviews and case studies; and has been awarded multiple industry, foundation, and NIH sponsored research grants. He actively participates in the peer review process of several neurointerventional and neurosurgery journals. He is a fellow of the American Heart Association (FAHA), an active member of the Society of Neurointerventional Surgery (SNIS), American Society of Neuroradiology (ASNR), Radiological Society of North America (RSNA) and the American College of Radiology (ACR). He has served as the American Board of Radiology (ABR) representative to the CESAC/NESAC credentialing committees, Board of Directors of the SNIS as the Medical Director of the SNIS Patient Safety Organization (PSO), which supported the national neurointerventional data registry Neurovascular Quality Initiative-Quality Outcomes Database (NVQI-QOD), and is currently a co-Chair of the Food and Drug Administration’s (FDA) Coordinated Registry Network (CRN) for Devices Used for Acute Ischemic Stroke Intervention (DAISI).