Justin Caplan, M.D.

Justin Michael Caplan, M.D.

Headshot of Justin Caplan
  • Assistant Professor of Neurosurgery


Acoustic Neuromas, Acute Stroke Care, Aneurysm Repair, Aneurysms, Arteriovenous Fistulas (AVF), Arteriovenous Malformations (AVM), Carotid Artery Stenosis, Cerebral Aneurysms, Cerebrovascular Diseases, Dural Arteriovenous Fistulas, Endovascular Surgery, Head & Neck Aneurysms, Intracerebral Hemorrhage, Intracranial Aneurysm, Minimally Invasive Endovascular Aneurysm Repair, Moyamoya Disease, Neurological Surgery, Neurosurgery, Open and Endovascular Surgical Techniques, Skull Base Tumors, Stroke, Stroke Imaging, Stroke Prevention, Stroke Recovery, Transient Ischemic Attack ...read more

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The Johns Hopkins Hospital (Main Entrance)

Appointment Phone: 410-955-1506
1800 Orleans St.
Sheikh Zayed Tower, Suite 6115C
Baltimore, MD 21287 map

Johns Hopkins Bayview Medical Center

Appointment Phone: 410-955-1506
4940 Eastern Avenue
301 Building, Suite 2100
Baltimore, MD 21224 map


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.

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  • MD; Harvard Medical School (2009)


  • Neurological Surgery; Johns Hopkins University School of Medicine (2016)


  • Neurological Surgery; University of Miami Miller School of Medicine (2017)

Board Certifications

  • American Board of Neurological Surgery (Neurological Surgery) (2022)

Research & Publications

Research Summary

Dr. Caplan’s research focuses on improving the understanding of the biology and clinical outcomes of cerebrovascular diseases and developing improved treatment options. He serves as an investigator in multiple clinical trials and studies. 

Selected Publications

View all on PubMed

Caplan JM, Colby G, Coon A, Huang J and Tamargo RJ. Managing Subarachnoid Hemorrhage in the Neurocritical Care Unit. Neurosurgery Clinics of North America 24(3):321-337, 2013

Caplan JM, Papadimitriou K, Wuyang Y, Colby GP, Coon AL, Olivi A, Tamargo RJ, Huang J. The minipterional craniotomy for anterior circulation aneurysms: Initial experience with 72 patients. Neurosurgery 10 (Suppl 2):200-207, 2014

Caplan JM, Groves M, Jusue-Torres I, Kim J, Liauw J, Bydon A, Tamargo RJ. Microsurgical Obliteration of a Thoracic Spinal Perimedullary Arteriovenous Fistula. Neurosurgical Focus 37 (Suppl 2):Video 13, 2014

Caplan JM, Sankey E, Yang W, Colby G, Coon A, Tamargo R, Huang J. Impact of Indocyanine Green Videoangiography on Rate of Clip Adjustments following Intraoperative Angiography. Neurosurgery 75:437-444, 2014

Caplan JM, Kaminsky I, Gailloud P, Huang J. A Single Burr-hole Approach for Direct Transverse Sinus Cannulation for the Treatment of a Dural Arteriovenous Fistula. Journal of NeuroInterventional Surgery 7:E5, 2015

Activities & Honors


  • Irving J. Sherman Award for Resident Achievement, Johns Hopkins University School of Medicine, Department of Neurological Surgery, 2012 - 2012
  • Timothy P. Susco Chair of Research Award for Excellence in Brain Aneurysm Research, Brain Aneurysm Foundation, 2013 - 2013
  • Walter Dandy Award for Clinical Research, Johns Hopkins University School of Medicine, Department of Neurological Surgery, 2014 - 2014
  • Step for Hope Chair of Research Award for Excellence in Brain Aneurysm Research, Brain Aneurysm Foundation, 2015 - 2015


  • American Association of Neurological Surgeons (AANS)
  • Congress of Neurological Surgeons (CNS)
  • Joint Cerebrovascular Section of the AANS/CNS
  • Society of NeuroInterventional Surgery (SNIS)

Professional Activities

  • Chair of Fellows Committee, Society of NeuroInterventional Surgery, 2016

Videos & Media

Play Video:

Brain Arteriovenous Malformation — Kate’s Story

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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