Current Neurosurgery Fellows
Nathan Nordmann, MD
Neurosurgical Spine Oncology Fellow 2025-2026
Residency: Southern Illinois University School of Medicine
Ali Rae, MD, MPH
Neurosurgical Oncology Fellow 2025-2026
Residency: Oregon Health & Science University
Sanjit Shah, MD
Neurosurgical Oncology Fellow 2025-2026
Residency: University of Cincinnati
Stephen G. Bowden, MD
Neurosurgical Oncology Fellow 2024-2025
Assistant Professor of Neurological Surgery
Oregon Health & Science University — Portland, Oregon
Justiss A. Kallos, MD
Neurosurgical Oncology Spine Fellow 2024-2025
Assistant Professor of Neurological Surgery
Weill Cornell Medicine — New York, NY
Stephanie Marie Robert, MD, PhD
Neurosurgical Oncology Fellow 2024-2025
Assistant Professor of Neurological Surgery
Thomas Jefferson University — Philadelphia, PA
Rabih Bou Nassif, MD
Memorial Sloan Kettering Spine Fellowship 2023-2024
Neurosurgeon / Instructor, Neurosurgery
Memorial Sloan Kettering — New, York, NY
David J. Voce, MD
Memorial Sloan Kettering Fellowship 2023-2024
Assistant Professor of Neurosurgery
Neurosurgical Oncologist
Univ. of South Florida & Tampa General Hospital — Tampa, FL
Xiaoran Zhang, MD
Memorial Sloan Kettering Fellowship 2023-2024
Neurosurgical Oncologist
Sutter Health East Bay Neuroscience Institute — Danville/Castro Valley, CA
Matthew Pease, MD
Memorial Sloan Kettering Fellowship 2022-2023
Assistant Professor of Neurological Surgery
Indiana University School of Medicine — Indianapolis, IN
Cole Lewis, MD
Memorial Sloan Kettering Fellowship 2022-2023
Neurosurgeon
Clinical Asst. Professor
Culicchia Neurological Clinic & LSU Health — New Orleans, LA
Ryan Khanna, MD
Memorial Sloan Kettering Fellowship 2022-2023
Assistant Professor & Director Spinal Oncology Research
Rutgers RWJ Medical School / Community Medical Center — Toms River, NJ
Tarek El-Ahmadieh, MD
Memorial Sloan Kettering Fellowship 2021-2022
Neurosurgical Oncologist
Clinical Assistant Professor
University of Missouri-Kansas City School of Medicine
Saint Luke’s Neurological & Spine Surgery — Kansas City, MO
Brian Gill, MD
Memorial Sloan Kettering Fellowship 2021-2022
Assistant Professor of Neurological Surgery
Columbia University Irving Medical Center — New York, NY
Vikram Chakravarthy, MD
Memorial Sloan Kettering Spine Fellowship 2021-2022
Assistant Professor of Neurological Surgery
Ohio State Univ. Wexner Medical Center — Columbus, OH
Anubhav Amin, MD
Memorial Sloan Kettering Spine Fellowship 2020-2021
Assistant Professor of Neurological Surgery
Univ. of Washington — Seattle, WA
Lee Hwang, MD
Memorial Sloan Kettering Fellowship 2020-2021
Neurosurgical Oncologist
St. Luke’s Univ. Health Network — Bethlehem, PA
Kenny Yu, MBBS, PhD, FRCS(SN)
Memorial Sloan Kettering Fellowship 2020-2021
Neurosurgical Oncologist
Memorial Sloan Kettering Cancer Center — New York, NY
W. Christopher Newman, MD
Memorial Sloan Kettering Fellowship 2019-2020
Assistant Attending Neurosurgeon
Memorial Sloan Kettering Cancer Center — New York, NY
Ankur R. Patel, MD
Memorial Sloan Kettering Fellowship 2019-2020
Assistant Professor of Neurological Surgery
UT Southwestern Medical Center — Dallas, TX
John Berry-Candelario, MD, MPH
Memorial Sloan Kettering Fellowship 2018-2019
Neurosurgeon
Novant Health Brain & Spine Oncology — Charlotte, NC
Celina Crisman, MD, MPH
Memorial Sloan Kettering Fellowship 2018-2019
Attending Neurosurgeon; Assistant Professor
Montefiore-Einstein — Bronx, NY
Ori Barzilai, MD
Memorial Sloan Kettering Fellowship 2016-2018
Associate Attending
Director of Minimally Invasive Spine Oncology
Memorial Sloan Kettering Cancer Center — New York, NY
Rupa Gopalan Juthanin, MD
Memorial Sloan Kettering Fellowship 2017-2018
Director, Endoscopic Pituitary & Skull Base Surgery
Neurosurgeons of New Jersey / Valley Health — Ridgewood/Paramus, NJ
Marie Roguski, MD, MPH
Memorial Sloan Kettering Fellowship 2017-2018
Neurosurgeon
Tufts Medical Center — Boston, MA
Hamish Alexander, MBChB MPhil FRACS
Memorial Sloan Kettering Fellowship 2016-2017
Neurosurgeon and Spine Surgeon
Briz Brain & Spine / Wesley Hospital — Brisbane, Australia
Adam M. Robin, MD, MS
Memorial Sloan Kettering Fellowship 2016-2017
Surgical Director CNS Metastatic Program
Co-Director Spine Tumor Program
Henry Ford Health — Detroit, MI
Koos Hovinga, MD
Memorial Sloan Kettering Fellowship 2015-2016
Consultant Neurosurgeon
Maastricht Univ. Medical Center+ — Maastricht, Netherlands
Yoshua Esquenazi Levy, MD
Memorial Sloan Kettering Fellowship 2015-2016
Assistant Professor
Director, Surgical Neuro-Oncology
Co-Director , Gamma Knife Radiosurgery Program
McGovern Medical School, UTHealth — Houston, TX
Muhammad Omar Chohan, MD
Memorial Sloan Kettering Fellowship 2014-2015
Associate Professor of Neurosurgery
Univ. of Mississippi Medical Center — Jackson, MS
Brad E. Zacharia, MD, MS
Memorial Sloan Kettering Fellowship 2014-2015
Assoc. Professor Neurosurgery & Otolaryngology
Director, Brain Tumor + Skull Base Surgery
Penn State Health Hershey — Hershey, PA
Toral Patel, MD
Memorial Sloan Kettering Fellowship 2013-2014
Associate Professor of Neurological Surgery
UT Southwestern — Dallas, TX
James Liu, MD
Memorial Sloan Kettering Fellowship 2013-2014
Neurosurgeon; Assistant Member, Neuro-Oncology
Moffitt Cancer Center & USF Health — Tampa, FL
Jennifer Moliterno Gunel, MD, FAANS
Memorial Sloan Kettering Fellowship 2012-2013
Associate Professor; Clinical Program Leader, Brain Tumor Program
Yale School of Medicine — New Haven, CT
Tiffany Powell Avila, MD
Memorial Sloan Kettering Fellowship 2012-2013
Neurosurgeon
Providence Health & Services — Mission Hills/Eureka, CA
Nduka Amankulor, MD
Memorial Sloan Kettering Fellowship 2011-2012
Chief of Neurosurgical Oncology and Director of the Penn Brain Tumor Center
University of Pennsylvania Perelman School of Medicine — Philadelphia, PA
John J. Kelly, MD PhD
Memorial Sloan Kettering Fellowship 2011-2012
Assistant Professor of Neurosurgery
Univ. of Calgary — Calgary, Canada
Ricardo Jorge Komotar, MD, FAANS, FACS
Memorial Sloan Kettering Fellowship 2010-2011
Professor of Neurosurgery
Director of Neurosurgery Residency Program
Director of Surgical Neurooncology
Director of Surgical Neurooncology Fellowship Program
Director of The University of Miami Brain Tumor Initiative
University of Miami Health System (Miami, FL)
Jonathan D. Sherman, MD
Memorial Sloan Kettering Fellowship 2010-2011
Chief, Neurosurgical Oncology
Professor of Neurosurgery
Rutgers Cancer Institute of New Jersey & Rutgers Robert Wood Johnson Medical School
Nicholas Szerlip, MD
Memorial Sloan Kettering Fellowship 2009-2010
Professor of Neurosurgery; Director, Spine Oncology
Univ. of Michigan Medicine — Ann Arbor, MI
J. Bradley Elder, MD
Memorial Sloan Kettering Fellowship 2009-2010
Associate Professor; Director, Brain Tumor & Skull Base Surgery
Ohio State Univ. Wexner Medical Center — Columbus, OH
Hugh Moulding, MD, PhD
Memorial Sloan Kettering Fellowship 2008-2009
Chief of Neurosurgery
St. Luke’s Univ. Health Network — Bethlehem, PA
Marc Goldman, MD
Memorial Sloan Kettering Fellowship 2008-2009
Neurosurgeon; Medical Director, South Sound Gamma Knife
Neurosurgery NW / MultiCare — Tacoma, WA
Rishi N. Sheth, MD
Memorial Sloan Kettering Fellowship 2007-2008
Neurosurgeon
Spine & Brain Surgery — Delray Beach, FL
Syed Azeem, MD
Memorial Sloan Kettering Fellowship 2006-2007
Neurosurgeon
Swedish Neuroscience Institute — Seattle, WA
Simone A. Betchen, MD
Memorial Sloan Kettering Fellowship 2005-2006
Chief of Neurosciences
UHS Neurosurgery — Johnson City, NY
Joseph DeMattia, MD
Memorial Sloan Kettering Fellowship 2004-2005
Neurosurgeon
NYC Health + Hospitals/Lincoln — Bronx, NY
Ashok Modha, MD, FRCSC
Memorial Sloan Kettering Fellowship 2003-2004
Neurosurgeon
Rebound Orthopedics & Neurosurgery — Vancouver, WA
Frederic Collignon, MD, PhD
Memorial Sloan Kettering Fellowship 2001-2002
Head, Dept. of Neurosurgery
CHIREC Delta Hospital & Clinique du Parc Leopold — Brussels, Belgium
Vikram Prabhu, MD, FACS
Memorial Sloan Kettering Fellowship 2001-2002
Professor of Neurological Surgery
Medical Director, Neurosurgery
Loyola University Medical Center — Maywood, IL
Todd Vitaz, MD
Memorial Sloan Kettering Fellowship 2000-2001
Director, Neurosurgical Oncology
Corewell Health (Spectrum Health) — Grand Rapids, MI
Cameron W. Brennan, MD
Memorial Sloan Kettering Fellowship 1999-2000
Attending Neurosurgeon
Fellowship Program Director
Memorial Sloan Kettering Cancer Center — New York, NY
Viswanathan Rajaraman, MD (Deceased)
Memorial Sloan Kettering Fellowship 1998-1999
Co-Chief, Neuro-oncology
Clinical Assistant Professor
Formerly John Theurer Cancer Center Hackensack Medical Center (Hackensack, NJ)
Viviane Tabar, MD
Memorial Sloan Kettering Fellowship 1997-1999
Chair, Department of Neurosurgery
Theresea C. Feng Chair in Neurosurgical Oncology
Director, Skull Base and Pituitary Tumor Center
Neurosurgical Laboratories
Memorial Sloan Kettering (New York, NY)