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Alexander Coon, M.D.

Alexander Lewis Coon, M.D.

Photo of Dr. Alexander Coon, M.D.

Director of Endovascular Neurosurgery

Assistant Professor of Neurosurgery


Expertise: Acute Stroke Care, Aneurysms, Arteriovenous Malformations (AVM), Carotid Artery Stenosis, Cavernous Malformations, Cerebral Aneurysms, Dural Arteriovenous Fistulas, Epilepsy, Hydrocephalus, Intracerebral Hemorrhage , Moyamoya Disease, Neurosurgery, Spinal Disorders, Stroke, Subarachnoid Hemorrhage more

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The Johns Hopkins Hospital (Main Entrance)
Appointment Phone: 410-955-2438

1800 Orleans St.
Baltimore, MD 21287 map
Phone: 410-955-2438
Fax: 443-287-0338

Johns Hopkins Bayview Medical Center
Appointment Phone: 410-955-2438

4940 Eastern Avenue
Baltimore, MD 21224 map

Contact for Research Inquiries

Johns Hopkins Hospital Neurosurgery
1800 Orleans Street
Zayed 6115E
Baltimore, MD 21287 map


Dr. Alexander Coon serves as the Director of Endovascular Neurosurgery for The Johns Hopkins Hospital. He is one of the world leaders in the endovascular treatment of cerebral aneurysms. Most known for his expertise in the use of flow-diverting stents to treat cerebral aneurysms, Dr. Coon has personally performed >300 cases using this technology. He has mentored other physicians in the use of this technology across the United States and around the world. He has published extensively on the techniques and outcomes associated with flow-diversion use for cerebral aneurysms. He has actively participated in numerous ongoing multi-center clinical trials for flow-diverting stent technology.

In addition to cerebral aneurysm surgery, his practice involves the surgical and endovascular treatment of arteriovenous malformations (AVMs), cavernous malformations, and dural arteriovenous fistulas (dAVFs) of the brain and spinal cord. Dr. Coon utilizes the latest surgical and endovascular techniques to treat patients with carotid artery stenosis, acute stroke, intracerberal hemorrhage (ICH), subarachnoid hemorrhage (SAH), and moyamoya disease. He also focuses on the specialized treatment of spinal disorders, neurological trauma, and hydrocephalus.

Dr. Alexander Coon currently sees patients at the Johns Hopkins Hospital Outpatient Center (JHOC) on Mondays or by alternate appointment in his office. more


  • Director of Endovascular Neurosurgery
  • Director of Endovascular Neurosurgery Fellowship Program
  • Assistant Professor of Neurosurgery
  • Assistant Professor of Neurology
  • Assistant Professor of Radiology and Radiological Science

Departments / Divisions

Centers & Institutes



  • MD, Columbia University College of Physicians and Surg (2003)


  • Johns Hopkins University School of Medicine / Neurosurgery (2010)

Board Certifications

  • American Board of Neurological Surgery / Neurosurgery (2014)

Research & Publications

Research Summary

Dr. Coons research interests are in the development of endovascular devices and the techniques and outcomes associated with their usage for cerebrovascular pathology. He has published extensively in the field of stroke and subarachnoid hemorrhage (SAH).

Selected Publications

View all on Pubmed

Colby GP, Coon AL, Tamargo RJ. Surgical management of subarachnoid hemorrhage. Neurosurg Clin N Am. 2010 Apr;21(2):247-61.

Kretzer RM, Coon AL, Tamargo RJ. Walter E. Dandys contributions to cerebrovascular neurosurgery. J Neurosurg. 2010 Jun;112(6):1182-91.

Momin, EN, Recinos PF, Coon AL, Rigamonti D. Use of intraoperative venography to guide the distal portion of a VA shunt past an obstruction in the central veins: Technical case report. Neurosurgery. 2010 Jun;66(6 Suppl Operative):370-1; discussion 371.

Paul AR, Colby GP, Radvany MG, Huang J, Tamargo RJ, Coon AL. Femoral access in 100 consecutive subarachnoid hemorrhage patients: the craniotomy of endovascular neurosurgery. BMC Res Notes. 2010 Nov 5;3:285.

Colby GP, Paul AR, Radvany MG, Gandhi D, Gailloud P, Huang J, Tamargo RJ, Coon AL,. A single center comparison of coiling versus stent-assisted coiling in 90 consecutive paraophthalmic region aneurysms. J Neurointerv Surg. 2012 Mar 1;4(2):116-20.

Wicks RT, Pradilla G, Raza SM, Hadelsberg U, Coon AL, Huang J, Tamargo RJ. Impact of changes in intraoperative somato-sensory evoked potentials (SSEPs) on stroke rates after clipping of intracranial aneurysms. Neurosurgery 2011 Nov 3 (e-pub)

Chaichana KL, Coon AL, Tamargo RJ, Huang J. Dural arteriovenous fistulas: epidemiology and clinical presentation. Neurosurg Clin N Am. 2012 Jan;23(1):7-13. Epub 2011 Oct 21.

Colby GP, Coon AL, Huang J, Tamargo RJ. Historical perspective of treatments for cranial arteriovenous malformations and dural arteriovenous fistulas. Neurosurg Clin N Am. 2012 Jan;23(1):15-25.

Paul AR, Colby GP, Huang J, Tamargo RJ, Coon AL. Selection of treatment of modalities or observation of dural arteriovenous malformations. Neurosurg Clin N Am. 2012 Jan;23(1):77-85. Epub 2011 Oct 21.

Pradilla G, Coon AL, Huang J, Tamargo RJ. Surgical treatment of cranial arteriovenous malformations and dural arteriovenous fistulas. Neurosurg Clin N Am. 2012 Jan;23(1):105-22.

Coon AL, Paul AR, Colby GP, Lin LM, Pradilla G, Huang J, Tamargo RJ. Comparison of tertiary-center aneurysm location frequencies in 400 consecutive cases: Decreasing incidence of posterior communicating artery region aneurysms. Surg Neurol Int. 2011;2:152. Epub 2011 Oct 29.

Colby GP, Lin LM, Gomez JF, Paul AR, Huang J, Tamargo RJ, Coon AL. Initial procedural outcomes in 35 consecutive aneurysm treatments using the pipeline embolization device: a single-center single user experience. J Neurointerv Surg 2013 May:5(3):237-46.

Colby GP, Lin LM, Gomez JF, Paul AR, Coon AL. In-situ removal of the pipeline embolization device: the corking and pseudo-corking techniques. J Neurointerv Surg 2013 Mar:5(2):e6

Colby GP, Lin LM, Paul AR, Huang J, Tamargo RJ, Coon AL. Cost comparison of endovascular treatment of anterior circulation aneurysms with the pipeline embolization device veruss stent-assisted coiling. Neurosurgery 2012 Nov:71(5):944-48

Colby GP, Lin LM, Coon AL. Revisiting the risk of intraparenchymal hemorrhage following aneurysm treatment by flow-diversion. Am J Neuroradiol 2012 Aug 33(7) E107

Colby GP, Lin LM, Zeiler SM, Coon AL. Curative reconstruction of an aneurysm by flow diversion with the Pipeline embolisation device in a patient with Loeys-Dietz Syndrome. BMJ Case Report 2014 Oct 16

Lin LM, Colby GP, Jiang B, Uwandu C, Huang J, Tamargo RJ, Coon AL. Classification of cavernous internal carotid artery tortuosity: a predictor of procedural complexity in Pipeline embolization. J Neurointerv Surg 2014 July 4.

Lin LM, Colby GP, Jiang B, Pero G, Boccardi E, Coon AL. Transvenous approach for the treatment of direct carotid cavernous fistula following Pipeline embolization of cavernous carotid aneurysm: a report of two cases and review of the literature. J Neurointerv Surg 2014 Aug 1.

Activities & Honors


  • Member
    American Association of Neurological Surgeons
  • Member
    Congress of Neurological Surgeons
  • Member
    European Society for Minimally Invasive Neurologic Therapy (ESMINT)
  • Senior Member
    Society for Neurointerventional Surgery (SNIS)

Videos & Media

Stroke Surgery - Tabatha's Story

Recent News Articles and Media Coverage

New surgery technique at Hopkins gives teenage aneurysm patient chance at a normal life, Baltimore Sun, March 26, 2017

Patient testimonial: Brianna's Story (February 2017)

A New Way to Treat Ischemic Stroke, NeuroLogic (Fall 2015)

A Moment's Notice: Coordinated advanced stroke care saves young patient, Johns Hopkins Bayview Health and Wellness News (Summer 2015)

Offering an Aneurysm Cure, NeuroNow (Spring 2013)

Press release: Adding Stent During Minimally Invasive Surgery To Repair Aneurysms Prevents Recurrence (07/28/2011)

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