Hospital  >  Departments  >  Surgery  >  Surgeons

Department of Surgery


Dr. Ashish Kumar
Dr. Ashish Kumar, MB.,MS, MCh


Sunnybrook Health Sciences Centre
2075 Bayview Ave., Room A1 34
Toronto, ON
M4N 3M5

Phone: 416-480-6100 ext. 65645
Fax: 416-480-6085

Administrative Assistant: Bernadette Lacey
Phone: 416-480-6100 ext. 65645


  • MBBS 2003, GMC Miraj, Shivaji University, India
  • MS (Gen Surgery) 2007, PMCH, Patna University, India
  • MCh (Neurosurgery) 2010, Bombay Hospital Institute of Medical Sciences, Mumbai, India
  • Fellowship 2010, Fujita Health University, Nagoya , Japan
  • Fellowship 2013-2014, Neurosurgery, University of Toronto, Canada
  • Fellowship, Interventional Neuro-radiology, University of Toronto, Canada

Appointments and Affiliations:

Research focus:

  • Clinical cerebrovascular neurosurgery (open vascular/ endovascular)

Keys areas of interest:

Dr. Ashish Kumar is an endovascular neurosurgeon at Sunnybrook Health Sciences Centre. Dr. Kumar's field of expertise is in cerebrovascular and endovascular surgery, with open cerebrovascular training at Fujita Health University, Nagoya, Japan, and fellowships at University of Toronto in neurosurgery and endovascular neurosurgery at Sunnybrook and St. Michael's Hospital respectively. He joined the Division of Neurosurgery as a surgeon-teacher and has a clinical practice centred in open and endovascular care of patients with cerebrovascular diseases.

As a teacher, his main interest is to increase exposure and foster the interest of neurosurgical residents in endovascular neurosurgery through the development of a core curriculum in the specialty, simulation protocols for dual training and optimal cerebrovascular exposure during neurosurgical residency.

Selected publications:

See current publications list.

  • Reconstructive vs Deconstructive Endovascular Approach to Intradural Vertebral Artery Aneurysms: A Multicenter Cohort Study. Kumar A, Dmytriw AA, Salem MM, et al. [published online ahead of print, 2020 Feb 5]. Neurosurgery. 2020;nyaa005. doi:10.1093/neuros/nyaa005
  • Traumatic anterior cerebral artery aneurysms and management options in the endovascular era. Kumar A, Jakubovic R, Yang V, Dacosta L. J Clin Neurosci. 2016;25:90‐95. doi:10.1016/j.jocn.2015.05.063
  • Surgical nuances of clipping after coiling: looking beyond the international subarachnoid aneurysm trial. Kato Y, Kumar A, Chen S. J Clin Neurosci. 2012;19(5):638‐642. doi:10.1016/j.jocn.2011.08.022
  • Pipeline embolization of posterior circulation aneurysms: A multicenter study of 131 aneurysms: Griessenauer CJ, Ogilvy CS, Adeeb N, Dmytriw AA, Foreman PM, Shallwani H, Limbucci N, Mangiafico S, Kumar A, Michelozzi C, Krings T, Pereira VM, Matouk CC, Harrigan MR, Shakir HJ, Siddiqui AH, Levy EI, Renieri L, Marotta TR, Cognard C, Thomas AJ. J Neurosurg. 2018 May 4:1-13. doi: 10.3171/2017.9.JNS171376.
  • Flow diversion for the treatment of basilar apex aneurysms: Dmytriw AA, Adeeb N, Kumar A, Griessenauer CJ, Phan K, Ogilvy CS, Foreman PM, Shallwani H, Limbucci N, Mangiafico S, Michelozzi C, Krings T, Pereira VM, Matouk CC, Zhang Y, Harrigan MR, Shakir HJ, Siddiqui AH, Levy EI, Renieri L, Cognard C, Thomas AJ, Marotta TR. Neurosurgery. 2018 Dec 1;83(6):1298-1305. doi: 10.1093/neuros/nyx628.
  • Risk of Branch Occlusion and Ischemic Complications with the Pipeline Embolization Device in the Treatment of Posterior Circulation Aneurysms. Adeeb N, Griessenauer CJ, Dmytriw AA, Shallwani H, Gupta R, Foreman PM, Shakir H, Moore J, Limbucci N, Mangiafico S, Kumar A, Michelozzi C, Zhang Y, Pereira VM, Matouk CC, Harrigan MR, Siddiqui AH, Levy EI, Renieri L, Marotta TR, Cognard C, Ogilvy CS, Thomas AJ. AJNR Am J Neuroradiol. 2018 Jul;39(7):1303-1309. doi: 10.3174/ajnr.A569

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