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School of Medicine
Geoffrey P. Colby, M.D., Ph.D.
Geoffrey Philip Colby, M.D., Ph.D.
Assistant Professor of Neurosurgery
Languages: English, Spanish
Expertise: Acute Stroke Care, Aneurysm Repair, Aneurysms, Arteriovenous Fistulas (AVF), Arteriovenous Malformations (AVM), Brain Tumors, Carotid Artery Stenosis, Carotid Artery Stenting, Cavernous Malformations, Cerebral Aneurysms, Dural Arteriovenous Fistulas, Endovascular Surgery, Moyamoya Disease, Neurosurgery, Stroke, Subarachnoid Hemorrhage ...read more
Research Interests: Improve and develop novel endovascular devices and techniques for treatment of cerebrovascular pathology, and understand how these devices interact with native blood vessel ...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
4940 Eastern Avenue
301 Building, Suite 2100
Baltimore, MD 21224 map
With combined training in open neurosurgery, endovascular neurosurgery, and interventional neuroradiology, Dr. Colby focuses on the surgical and endovascular treatment of aneurysms, arteriovenous malformations (AVMs), cavernous malformations, and dural arteriovenous fistulas (dAVFs) of the brain and spinal cord. These treatments include the most modern and sophisticated endovascular techniques of aneurysm flow diversion.
Dr. Colby has expertise in the pre-operative embolization of solid brain and spinal tumors. He also uses the latest surgical and endovascular techniques to treat patients with carotid artery stenosis, acute stroke, intracerberal hemorrhage (ICH), subarachnoid hemorrhage (SAH) and moyamoya disease.
- Assistant Professor of Neurosurgery
- Assistant Professor of Neurology
- Assistant Professor of Radiology and Radiological Science
Departments / Divisions
- MD, Columbia University College of Physicians and Surgeons (2006)
- Johns Hopkins University School of Medicine / Neurosurgery (2013)
- American Board of Neurological Surgery
- American Board of Neurological Surgery / Neurological Surgery
Research & Publications
Through his research, Dr. Colby seeks to improve and develop novel endovascular devices and techniques for treatment of cerebrovascular pathology. He also seeks to understand how these devices interact with native blood vessels. Dr. Colby has published extensively in the field of endovascular aneurysm treatment using the flow diversion technique, as well as stroke and subarachnoid hemorrhage (SAH).
Selected PublicationsView all on Pubmed
Immediate procedural outcomes in 44 consecutive Pipeline Flex cases: the first North American single-center series.
Colby GP, Lin LM, Caplan JM, Jiang B, Huang J, Tamargo RJ, Coon AL.
J Neurointerv Surg. 2015 Jul 1. pii: neurintsurg-2015-011894. doi: 10.1136/neurintsurg-2015-011894. [Epub ahead of print]
Flow diversion of large internal carotid artery aneurysms with the surpass device: impressions and technical nuance from the initial North American experience.
Colby GP, Lin LM, Caplan JM, Jiang B, Michniewicz B, Huang J, Tamargo RJ, Coon AL.
J Neurointerv Surg. 2015 May 18. pii: neurintsurg-2015-011769. doi: 10.1136/neurintsurg-2015-011769. [Epub ahead of print]
Radiation dose analysis of large and giant internal carotid artery aneurysm treatment with the pipeline embolization device versus traditional coiling techniques.
Colby GP, Lin LM, Nundkumar N, Jiang B, Huang J, Tamargo RJ, Coon AL.
J Neurointerv Surg. 2015 May;7(5):380-4. doi: 10.1136/neurintsurg-2014-011193. Epub 2014 Apr 8.
Cost comparison of endovascular treatment of anterior circulation aneurysms with the pipeline embolization device and stent-assisted coiling.
Colby GP, Lin LM, Paul AR, Huang J, Tamargo RJ, Coon AL.
Neurosurgery. 2012 Nov;71(5):944-48; discussion 948-50. doi: 10.1227/NEU.0b013e3182690b8b.
A single center comparison of coiling versus stent assisted coiling in 90 consecutive paraophthalmic region aneurysms.
Colby GP, Paul AR, Radvany MG, Gandhi D, Gailloud P, Huang J, Tamargo RJ, Coon AL.
J Neurointerv Surg. 2012 Mar;4(2):116-20. doi: 10.1136/jnis.2011.004911. Epub 2011 May 11.
Activities & Honors
- Neurosurgery Chairman’s Award for Improving Patient Safety., Johns Hopkins University, Baltimore, MD, 2012
- “Best Fellow’s Abstract,” Awarded for best scientific paper on the area of neurointerventional research., Society of Neurointerventional Surgery 2012 Annual Meeting, San Diego, CA, 2012
- Neurosurgery Chairman’s Award of Excellence in Teaching, Department of Neurological Surgery, Johns Hopkins University, Baltimore, MD, 2015