Benjamin L. Grannan, MD

Benjamin L. Grannan, MD - Headshot
Job Title
Assistant Professor of Neurological Surgery

Dr. Grannan is a neurosurgeon at the University of Washington Medical Center and at the Epilepsy Center at Harborview Medical Center.  He received dual Bachelor of Science degrees in Physics and Biology from the Massachusetts Institute of Technology (MIT).  He received his Doctor of Medicine degree from Harvard Medical School and completed neurosurgery residency training at the Massachusetts General Hospital (MGH) and Harvard Medical School.  During residency, he was a recipient of the Neurosurgery Research and Education Foundation and NIH T32 research grants, which supported his postdoctoral research fellowship in the Ziv Williams Lab at MGH.  He moved to Seattle following residency training to complete a fellowship in Epilepsy, Movement Disorders, and Brain Tumor mapping at the University of Washington.  He then stayed on as Assistant Professor in the University of Washington Department of Neurological Surgery. 

Clinical Interest

Dr. Grannan has a clinical focus on functional neurosurgery, which includes epilepsy surgery (resection seizure foci, responsive neurostimulation, deep brain stimulation, laser ablation, stereo-EEG), movement disorder surgery including deep brain stimulation and ablative procedures, neuromodulation, brain tumor surgery including brain mapping techniques, treatment of trigeminal neuralgia (microvascular decompression, radiofrequency ablation, balloon compression), hemifacial spasm surgery, peripheral nerve transfer procedures for brachial plexus or other peripheral nerve injuries, and peripheral nerve and spine tumors. 

Research Interests

Dr. Grannan's research focuses on the use of clinical intracranial brain recordings to study aspects of human cognition including language processing.  

Personal Interests

Having fun with his wife and three children; skiing, cycling, running, swimming, and other outdoor adventures. 


Undergraduate Education

Massachusetts Institute of Technology

Medical Education

Harvard Medical School


Massachusetts General Hospital and Harvard Medical School

  1. M. Jamali, B. L. Grannan, E. Fedorenko, R. Saxe, R. Báez-Mendoza, and Z. M. Williams. “Single-neuronal predictions of others’ beliefs in humans”. In: Nature (Jan. 27, 2021). Publisher: Na- ture Publishing Group, pp. 1–5.
  2. B. L. Grannan. “Neurosurgical Interventions for Pain”. In: The Massachusetts General Hospital Hand- book of Pain Management: 4th Edition. Ed. by G. J. Brenner and J. P. Rathmell. Lippincott Williams and Wilkins, 2021.
  3. B. D. Choi, B. L. Grannan, D. P. Cahill, and W. T. Curry. “Commentary: The Glioma-Network Interface: A Review of the Relationship Between Glioma Molecular Subtype and Intratumoral Function”. In: Neurosurgery (Dec. 28, 2020), nyaa517.
  4. R. M. Koffie, A. M. Giantini Larsen, B. L. Grannan, M. Hadzipasic, V. Yanamadala, L. V. Beaver, G. M. Shankar, and J. H. Shin. “Novel Technique for C1–2 Interlaminar Arthrodesis Utilizing a Modified Sonntag Loop-Suture Graft With Posterior C1–2 Fixation”. In: Neurospine 17.3 (Sept. 2020), pp. 659–665.
  5. S. K. Bick, M. S. Dolatshahi, B. Grannan, A. J. Cole, D. B. Hoch, and E. N. Eskandar. “Preop- erative MRI findings and prediction of diagnostic utility of foramen ovale electrodes”. In: Journal of Neurosurgery (Mar. 8, 2019), pp. 1–8.
  6. M. Jamali*, B. L. Grannan*, K. Haroush*, Z. B. Moses, E. N. Eskandar, T. Herrington, S. Patel, and Z. M. Williams. “Dorsolateral prefrontal neurons mediate subjective decisions and their variation in humans”. In: Nature Neuroscience (Apr. 22, 2019).
  7. A. Giantini Larsen, B. L. Grannan, C. K. Lee, M. J. Koch, E. A. Williams, M. P. Frosch, and D. P. Cahill. “Malignant Melanoma Metastatic to Oligodendroglioma: Case Report and Literature Review of Tumor-to-Tumor Metastasis to Gliomas”. In: Journal of Neuropathology & Experimental Neurology 77.7 (July 1, 2018), pp. 549–554.
  8. B. Grannan, M. Hadzipasic, and E. Eskandar. “Ablative Neurosurgical Procedures for Chronic Pain: Sixth Edition”. In: Bonica’s Management of Pain: Fifth Edition. Ed. by J. P. R. Jane C. Ballantyne Scott M. Fishman. Lippincott Williams and Wilkins, 2018.
  9. A. Hazama, J. Diver, B. Grannan, H. Dasenbrock, and L. Goumnerova. “Iatrogenic obstructive hydrocephalus resulting from Gelfoam accumulation within the cerebral aqueduct: a case report”. In: Child’s Nervous System 34.11 (Nov. 1, 2018), pp. 2333–2335.
  10. A. M. G. Larsen, B. L. Grannan, R. M. Koffie, and J.-V. Coumans. “Atlantoaxial Fusion Using C1 Sublaminar Cables and C2 Translaminar Screws”. In: Operative Neurosurgery 14.6 (June 1, 2018), pp. 647–653.
  11. R. A. Sastry, M. J. Koch, B. L. Grannan, C. J. Stapleton, W. E. Butler, and A. B. Patel. “Flow diversion of a recurrent, iatrogenic basilar tip aneurysm in a pediatric patient: case report”. In: Journal of Neurosurgery: Pediatrics 21.1 (Jan. 1, 2018), pp. 90–93.
  12. G. M. Shankar, B. D. Choi, B. L. Grannan, K. Oh, and J. H. Shin. “Effect of Immunotherapy Status on Outcomes in Patients With Metastatic Melanoma to the Spine:” in: SPINE 42.12 (June 2017), E721–E725.
  13. G. N. Friedman, B. L. Grannan, V. Yanamadala, G. M. Shankar, J. C. Dewitt, V. Puthenpura, R. M. Koffie, S. M. Macdonald, D. H. Ebb, M. P. Frosch, and A.-C. Duhaime. “Rapid Neurolog- ical Recovery Following Partial Surgical Resection of Spinal Glioblastoma Multiforme in a Pediatric Patient Presenting With Complete Paraplegia:” in: Journal of Pediatric Hematology/Oncology 38.8 (Nov. 2016), e286–e290.
  14. G. N. Friedman, B. L. Grannan, B. V. Nahed, and P. J. Codd. “Initial Experience with High- Definition Camera-On-a-Chip Flexible Endoscopy for Intraventricular Neurosurgery”. In: World Neu- rosurgery 84.6 (Dec. 1, 2015), pp. 2053–2058.
  15. B. Grannan, W. Linda Bi, and I. Dunn. “Pseudo-Cerebrospinal Fluid Rhinorrhea Resulting from Aberrant Cross-Innervation of Trigeminal and Facial Nerves following Skull Base Surgery”. In: Jour- nal of Neurological Surgery Reports 76.1 (Jan. 16, 2015), e62–e64.
  16. B. L. Grannan, V. Yanamadala, A. S. Venteicher, B. P. Walcott, and J. C. Barr. “Use of external ventriculostomy and intrathecal anti-fungal treatment in cerebral mucormycotic abscess”. In: Journal of Clinical Neuroscience 21.10 (Oct. 1, 2014), pp. 1819–1821.
  17. B. L. Grannan, V. Yanamadala, B. P. Walcott, C. J. Stapleton, and C. S. Ogilvy. “Repeated neurovascular imaging in subarachnoid hemorrhage when initial studies are negative”. In: Journal of Clinical Neuroscience 21.6 (June 1, 2014), pp. 993–996.