Dr. Caplan specializes in the treatment of cerebrovascular disorders of the brain, head, neck and spine, such as aneurysms, arteriovenous malformations, arteriovenous fistulas, moyamoya disease, carotid artery stenosis and stroke. He is dual fellowship trained in both open cerebrovascular neurosurgery and endovascular neurosurgery, allowing him to offer patients the full spectrum of the latest surgical and endovascular techniques in treating these diseases. Dr. Caplan also focuses on treating acoustic neuromas and other tumors of the skull base, including meningiomas. Dr. Caplan graduated with honors from the Johns Hopkins University with a degree in neuroscience, where he spent time in the Hunterian Neurological Surgery Research Laboratory. He then earned his medical degree from Harvard Medical School. He completed his neurosurgery residency at Johns Hopkins, along with fellowships in cerebrovascular neurosurgery and endovascular neurosurgery, also at Johns Hopkins. He then completed an additional fellowship in endovascular neurosurgery at the University of Miami before returning to join the Johns Hopkins faculty. Dr. Caplan is rated as a Distinguished provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Brain Aneurysm, Arteriovenous Malformation, Cerebral Arteriovenous Malformation, Thrombectomy, and Carotid Artery Surgery.

Dheeraj Gandhi is a Neuroradiologist in Baltimore, Maryland. Dr. Gandhi is rated as a Distinguished provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Brain Aneurysm, Stroke, Subarachnoid Hemorrhage, Thrombectomy, and Thalamotomy.

Jay Agrawal is a Neuroradiologist in Baltimore, Maryland. Dr. Agrawal is rated as a Distinguished provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Cerebral Arteriovenous Malformation, Stroke, CAPOS Syndrome, and Radiation Induced Meningioma.

Dr. Tamargo specializes in the treatment of aneurysms, arteriovenous malformations (AVMs), arteriovenous fistulas (AVFs), and cavernous malformations of the brain and spinal cord in both adults and children. Dr. Tamargo specializes in revascularization procedures for moyamoya disease. For this condition, Dr. Tamargo performs either a microsurgical encephaloduroarteriomyosynangiosis (EDAMS) or a microsurgical extracranial-to-intracranial artery bypass. Dr. Tamargo also specializes in the treatment of acoustic neuromas (vestibular schwannomas). A recipient of numerous honors and awards, some of Dr. Tamargo's most recent accolades include the Neurosurgery Faculty Teaching Award and the Hopkins Richard S. Ross Clinician Scientist Award. Dr. Tamargo is rated as an Advanced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Brain Aneurysm, Subarachnoid Hemorrhage, Acoustic Neuroma, and Schwannoma.

L. Fernando Gonzalez, M.D., is a cerebrovascular neurosurgeon trained in both open vascular surgery and minimally invasive endovascular approaches. He treats patients with vascular blockages, malformations and ruptures in the brain and spine, including aneurysms, strokes and arteriovenous malformations. He also specializes in delivering chemotherapy through the arteries of the brain for treatment of certain eye cancers, such as retinoblastomas — the most common eye cancer in children — and lacrimal gland carcinomas. Dr. Gonzalez sees patients at The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center. Dr. Gonzalez earned his medical degree from Pontificia Universidad Javeriana in Bogota, Colombia, where he also completed residency training in neurosurgery. He completed a neurosurgery research fellowship at Barrow Neurological Institute in Phoenix, Arizona, with a focus on skull base, vascular and microanatomy microsurgery. Dr. Gonzalez continued his training at Barrow by completing a second residency, during which he pursued additional fellowships in spine surgery, endovascular neurosurgery, and cerebrovascular and skull base surgery. Dr. Gonzalez is widely published in his field and actively pursues novel approaches to treatment. He invented an aspiration catheter with an attached guidewire, and a surgical retractor for minimally invasive brain surgery. He is also a co-inventor of a direct cerebral cooling device that allows clinicians to decrease cerebral temperature to protect the brain when needed after cardiac arrest, severe trauma or large strokes. Videos Meet Our Expert: L. Fernando Gonzalez, M.D.Cerebrovascular Neurosurgery. Dr. Gonzalez is rated as an Advanced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Brain Aneurysm, Subarachnoid Hemorrhage, Stroke, Stent Placement, and Transmyocardial Revascularization.

Dr. David M. Yousem is the associate dean for professional development in the Johns Hopkins Medicine Department of Radiology and Radiological Science. He specializes in neuroimaging. Dr. Yousem received his B.S. and M.D. degrees at the University of Michigan. He completed a radiology residency at Johns Hopkins and a two-year fellowship in neuroradiology at the University of Pennsylvania. He received his M.B.A. at Johns Hopkins University in 2003. Dr. Yousem's expertise spans the full gamut of neuroradiology techniques including computed tomography (CT), magnetic resonance imaging (MRI), angiography, myelography, CT guided aspirations and biopsies, functional MRI, diffusion and perfusion imaging, MR/CT angiography, and 3-D reconstructions. He is a noted authority on disorders of the brain, spine, head and neck, olfaction, cranial neuropathies and neurodegeneration. Dr. Yousem has authored or edited four books—Neuroradiology: THE REQUISITES, Head and Neck Case Review, and Radiology Business Practice: How to Succeed, and Non-Interpretive Skills Case Review, all published by Mosby/Elsevier—and has edited four journal issues. He has published over 250 peer reviewed articles over 50 chapters in books and has lectured on five continents. Dr. Yousem has an RSNA Educator Award sponsored on line course containing over 30 lectures on the Business of Medicine available to the public at https://webcast.jhu.edu/Mediasite/Catalog/Full/2facf598655b40ecaf3e7ee71698b86421. This is currently used by residency programs across the country to fulfill ACGME requirements for business of radiology content. He served as President of the American Society of Neuroradiology in 2008-2009 and as the Secretary of Treasurer of the World Federation of Neuroradiological Societies from 2011 to present. He sits on many of national radiological societies committees. Dr. Yousem has completed two marathons (best time: 3 hours, 54 minutes), a half Ironman, and a full Ironman (2.5-mile swim followed by 112-mile bike ride and then a 26-mile run) competition. Videos David M. Yousem e-Radiology Learning - Neuroradiology Pearls and Pitfalls (1 of 4) e-Radiology Learning - Neuroradiology Pearls and Pitfalls (2 of 4) e-Radiology Learning - Neuroradiology Pearls and Pitfalls (3 of 4) e-Radiology Learning - Neuroradiology Pearls and Pitfalls (4 of 4). Dr. Yousem is rated as an Advanced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Hydrocephalus, Congenital Cardiovascular Shunt, Normal Pressure Hydrocephalus, Subarachnoid Hemorrhage, and Embolectomy.

Jeffrey Mewborne is a Radiologist in Baltimore, Maryland. Dr. Mewborne is rated as an Advanced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Herniated Disk, Stroke, Headache, and Cerebral Arteriovenous Malformation.

Dr. Sachin K. Gujar is an Assistant Professor and Magnetic Resonance Section Chief in Johns Hopkins Department of Radiology and Radiological Sciences. His area of clinical expertise is Neuroradiology. He earned his M.B.B.S. (medical degree) from Byramjee Jeejeebhoy Medical College in Pune, India. After completing a radiology residency (M.D.) at the same college, he completed a two-year neuroradiology fellowship at the University of Michigan, and subsequently was on faculty at University of Michigan for over 5 years. Dr. Gujar has been a member of the Johns Hopkins Neuroradiology faculty since 2008. Dr. Gujar’s areas of clinical interest include all aspects of adult neuroradiology, including head and neck radiology, spine and spinal cord disorders, and cerebrovascular diseases, with particular interest in brain tumor imaging, physiologic imaging, and Functional MRI. He has published numerous articles on various topics in Neuroradiology. Dr. Gujar is rated as an Advanced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Normal Pressure Hydrocephalus, Hydrocephalus, Cerebral Arteriovenous Malformation, Stroke, and Microvascular Decompression.

Dr. Rohini Nadgir is an Assistant Professor in the Johns Hopkins Medicine Department of Radiology and Radiological Science. Her area of clinical expertise is Diagnostic Neuroimaging. Dr. Nadgir earned her B.A. from Columbia University and her M.D. from University of Pennsylvania. She completed her medical internship at Christiana Care Medical Center in Newark, DE and her Diagnostic Radiology residency at Boston University Medical Center. She completed her Neuroradiology fellowship at Johns Hopkins Hospital. Dr. Nadgir joined the Radiology faculty at Johns Hopkins Hospital in 2012. In addition to her clinical work, she has a particular interest in education of residents and fellows in Neuroradiology. She has authored numerous book chapters and contributed to publications focused on Neuroimaging techniques particularly in the head and neck region. Dr. Nadgir is rated as an Advanced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. Her top areas of expertise are Cerebellum Agenesis Hydrocephaly, CAPOS Syndrome, Cerebral Arteriovenous Malformation, and Hydrocephalus.

Dr. Majid Khan is a Radiologist and Director, Non-Vascular Spine Intervention at Johns Hopkins University hospitals. Dr. Khan graduated from University of Kashmir, India in 1993. He completed his residency in radiology at the Nassau University Medical Center at Stony Brooks University and then completed his fellowship in Neuroradiology at Johns Hopkins University. Dr. Majid is deeply invested in both diagnostic Neuroradiology with particular emphasis on advanced head & neck and spine tumor imaging. His prime interest is doing spine tumor ablations primarily using microwave ablation devices and has performed the most number of such cases in the United States. He has significant expertise in spine cement augmentation procedures like kyphoplasty and vertebroplasty for treatment of compression fractures due to osteoporosis, multiple myeloma and/or other tumor-associated pathological fractures, sacroplasty for the treatment of fractures of the sacrum, epidural steroid injections, facet and transforaminal nerve blocks. He has treated a considerable number of patients with Tarlov and synovial cysts. Dr. Khan is a core member of Johns Hopkins Headaches and CSF Leak Program doing both targeted and non-targeted blood and fibrin glue patches. In addition, Dr. Khan has performed numerous imaging-guided head and neck biopsies with expertise in deep trans-facial biopsies. Dr. Majid has contributed to numerous publications and book chapters and has given regional, national and international talks, as well as presented research at many national meetings. He is a member of the American Society of Neuroradiology, American College of Radiology, American Society of Spine Radiology, North American Spine Society, Radiologic Society of North America, European Society of Radiology. Dr. Khan is rated as an Experienced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Cerebrospinal Fluid Leak, Meningocele, Tarlov Cysts, Vertebroplasty, and Bone Graft.

Risheng Xu, M.D., Ph.D., is a fellowship-trained neurosurgeon with expertise in cerebrovascular and endovascular neurosurgery, and skull base pathologies. He treats patients with a wide range of cerebrovascular disorders such as cerebral aneurysms, subarachnoid hemorrhage, arteriovenous malformations, arteriovenous fistulas, carotid stenosis, cavernous malformations and moyamoya disease. He also treats skull base tumors such as acoustic neuromas (vestibular schwannomas) and meningiomas, and pain disorders such as trigeminal neuralgia. Dr. Xu completed his undergraduate studies at Harvard College, and attended medical school at the Johns Hopkins University School of Medicine, where he also obtained a Ph.D. in pharmacology and molecular sciences. He continued his residency training in neurosurgery at Johns Hopkins, and remained there to complete a fellowship in cerebrovascular and endovascular neurosurgery. Dr. Xu has been active in research throughout his training and has authored and co-authored numerous published studies. His basic science research endeavors focus on neuroinflammation after ischemic stroke and molecular mechanisms underlying trigeminal neuralgia. He has authored or co-authored over 100 manuscripts, and has published in journals such as Nature, Nature Communications, Science Advances, Science Signaling, Neuron, the Proceedings of the National Academy of Sciences (PNAS), the Journal of Neurosurgery, Neurosurgery and other journals. Clinically, he studies the long-term outcomes of patients with cerebrovascular disorders and trigeminal neuralgia. Dr. Xu is rated as an Experienced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Brain Aneurysm, Subarachnoid Hemorrhage, Stroke, Transmyocardial Revascularization, and Stent Placement.

Dr. Eric Jackson specializes in the evaluation and treatment of patients with a broad range of neurosurgical disorders, including congenital malformations of the brain and spine, hydrocephalus (including endoscopic treatment), chiari malformation, craniosynostosis, spinal dysraphism/tethered cord, brain and spinal cord tumors, and traumatic brain injuries. He is the Principal Investigator for several multi-institution research studies, including: Hydrocephalus Clinical Research Network: currently investigating endoscopic surgery vs shunting for the treatment of hydrocephalus in infants in a $10M randomized trial funded by the NIH Park Reeves Syringomyelia Research Consortium Advancing the treatment for pediatric craniopharyngioma, identifying biological targets for molecular therapy A multi-institutional trial investigating a non-invasive eye tracking device for assessing increased intracranial pressure. Dr. Jackson is rated as an Experienced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Hydrocephalus, Chiari Malformation, Chiari Malformation Type 2, Posterior Fossa Decompression, and Endoscopy.

Dr. Felling is the director of the Johns Hopkins Pediatric Stroke Program and specializes in the evaluation and treatment of children with a wide range of cerebrovascular disorders. With combined training in child neurology and vascular neurology he offers expertise in both the acute diagnosis and treatment of stroke as well as longitudinal management of the neurological consequences of stroke in children. Dr. Felling earned both his M.D. and his Ph.D. in neuroscience at Penn State College of Medicine. He completed residency training in pediatrics at the Children’s Hospital of Philadelphia. He also completed residency training in pediatric neurology and a fellowship in vascular neurology at Johns Hopkins. Dr. Felling's goal is to improve the clinical care of patients through the development of efficient pathways for the rapid evaluation and treatment of children presenting with stroke. He is part of a multidisciplinary team of providers that care for children with cerebrovascular disorders. Clinical research efforts are aimed at improving neurological function in children following stroke and other brain injuries. Dr. Felling is rated as an Experienced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Stroke, Concussion, Delirium, Thrombectomy, and Endovascular Embolization.

Dr. Victor Urrutia serves as the medical director of the stroke service at The Johns Hopkins Hospital and director of the Sheikh Khalifa Stroke Institute. He focuses on the clinical aspects of cerebrovascular disease (stroke), specifically acute stroke therapy and prevention. Dr. Urrutia currently sees patients at the Stroke Prevention Clinic, located in the Johns Hopkins Outpatient Center in Baltimore on Wednesdays, and cares for patients in The Johns Hopkins Hospital's Brain Rescue Unit. Dr. Victor Urrutia received his medical degree from the University of Panama School of Medicine. He completed his neurology training at MCP Hahnemann University in Philadelphia, now Drexel University College of Medicine. After his residency training, he completed fellowship training in neurocritical care and acute stroke at Drexel University College of Medicine and became a faculty member in the neurocritical care and acute stroke division. He then returned to Panama for two years where he was the first to treat patients with IV thrombolytic therapy for acute stroke. Dr. Urrutia is rated as an Experienced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Stroke, Transient Ischemic Attack (TIA), Vertigo, Thrombectomy, and Gastrostomy.

Neurologist Michelle C. Johansen specializes in prevention and treatment of stroke. She is the inaugural Guy McKhann Associate Professor of Neurology — the title was established in honor of the founder of the Johns Hopkins Department of Neurology. Dr. Johansen’s research and clinical interests focus on stroke etiology and vascular contributions to cognitive decline. She studies the intersection between the brain and the heart, specifically how changes in the heart’s structure and function point toward the cause of stroke and impact brain health, including cognition. She received the American Stroke Association’s Vascular Cognitive Impairment Award for her work showing that myocardial infarction is associated with acute and progressive decline in cognition, the American Academy of Neurology’s A.B. Baker Teacher Recognition Award and the Johns Hopkins Department of Neurology’s Clinical Faculty Brain Award for excellence in teaching. She has received multiple grants to fund her research from the National Institute of Neurological Disorders and Stroke, the National Institute on Aging and the American Heart Association. Dr. Johansen’s work has been published in many high-ranking medical journals such as The Journal of the American Medical Association, and she has been interviewed as an expert for news outlets such as CNN and Medical News Today, as well as for webinars and podcasts. She is a member of the American Neurological Association and chair of its Education Innovation Committee, and she is a fellow of the American Heart Association. She received her medical degree from the Medical College of Virginia, where she was inducted into the Alpha Omega Alpha Honor Society, and she earned a postdoctoral degree in clinical investigation from the Johns Hopkins Bloomberg School of Public Health. Dr. Johansen completed a medicine internship and neurology residency at the University of Virginia, followed by a clinical fellowship in cerebrovascular neurology at Johns Hopkins. She joined the Johns Hopkins Department of Neurology faculty in 2017. The Johansen Lab: johansenlab.org Videos Johns Hopkins Medicine A Woman's Journey Executive Women's Briefing 2021 Neurology: Junior Faculty Spotlight. Dr. Johansen is rated as an Experienced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. Her top areas of expertise are Stroke, Dementia, Apoplexy, Cerebral Amyloid Angiopathy, and Thrombectomy.

Dr. Argye Hillis is a professor of Neurology, with joint faculty appointments in Physical Medicine and Rehabilitation and in Cognitive Science. She is also the Sheikh Khalifa Stroke Institute Professor of Acute Stroke Diagnoses and Management. Prior to medical training and neurology residency, Dr. Hillis worked as a speech-language pathologist, and conducted clinical research focusing on understanding and treating aphasia and hemispatial neglect. She has brought these areas of experience to impact on her clinical research in neurology, which involves cognitive and neuroimaging studies of aphasia and hemispatial neglect due to acute stroke and focal dementias. She has published extensively on these topics in journals and textbooks. Dr. Hillis is Associate Editor of Stroke and has served as Associate editor of Brain, Annals of Neurology, Aphasiology, American Journal of Speech-Language Pathology, Neurocase, Cognitive Neuropsychology, and Language and Cognitive Processes and served as co-Editor and Chief of Behavioral Neurology. Dr. Hillis serves as the Executive Vice Chair of the Department of Neurology and the Director of the Cerebrovascular Division of Neurology at Johns Hopkins. Dr. Hillis is rated as an Experienced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. Her top areas of expertise are Primary Progressive Aphasia, Stroke, Frontotemporal Dementia, Thrombectomy, and Gastrostomy.

Mari Groves is a Johns Hopkins pediatric neurosurgeon who cares for children with brain and spinal cord tumors (benign and cancerous), skeletal dysplasia, and spinal deformities such as neuromuscular and early scoliosis. She also sees patients diagnosed with Chiari malformations, spasticity and epilepsy. She specializes in treating patients with all types of spina bifida, including myelomeningocele. As part of the Johns Hopkins Center for Fetal Therapy, she is an expert in prenatal closure techniques such as minimally invasive fetoscopic repair of myelomeningocele (when the spina bifida defect is repaired before birth). Offering a transitional practice model of care, she follows patients diagnosed with spina bifida from birth to adulthood. Dr. Groves chose to pursue neurosurgery because it allows her to treat patients with complex conditions and help improve the quality of children’s lives. Her research interests focus on pediatric spinal disease and how surgical intervention can impact growth and neurological function during a child’s life. She is committed to building programs that support patients with congenital disorders as they age. Pediatric patients often age out of existing programs and have difficulty locating physicians and treating teams that understand their conditions. At Johns Hopkins, we have a unique ability to provide this type of comprehensive care. Dr. Groves earned her medical degree from the Vanderbilt University School of Medicine in 2007. She completed residency training in 2014 at The Johns Hopkins Hospital, where she remained for a neurosurgery fellowship, which she finished in 2015. She also completed a spinal deformity fellowship at Shriners Hospitals for Children in Philadelphia. Dr. Groves is rated as an Experienced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. Her top areas of expertise are Spinal Tumor, Myelomeningocele, Tethered Cord Syndrome, Osteotomy, and Laminectomy.

Prashant Raghavan is a Neuroradiologist in Baltimore, Maryland. Dr. Raghavan is rated as an Advanced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Stroke, Pseudotumor Cerebri Syndrome, Cerebral Arteriovenous Malformation, Traumatic Brain Injury, and Thrombectomy.

Joseph Simard is a Neurosurgery provider in Baltimore, Maryland. Dr. Simard is rated as a Distinguished provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. His top areas of expertise are Wyburn-Mason Syndrome, Vein of Galen Aneurysm, Arteriovenous Malformation, Gastrostomy, and Carotid Artery Surgery.

Erin O'connor is a Neuroradiologist in Baltimore, Maryland. Dr. O'connor is rated as an Advanced provider by MediFind in the treatment of Cerebral Arteriovenous Malformation. Her top areas of expertise are Stroke, Cerebral Arteriovenous Malformation, Brain Aneurysm, and Subarachnoid Hemorrhage.