Sentara Healthcare Sentara Healthcare

About the Physicians and Staff

Joseph K. Han, MD Joseph K. Han, MD
Otolaryngology, Sentara Norfolk General Hospital

Director, Division of Rhinology and Endoscopic Sinus and Skull Base Surgery
Associate Professor, Rhinology Endoscopic Sinus and Skull Base Surgery
Eastern Virginia Medical School
825 Fairfax Avenue, Suite 510
Norfolk, VA 23507

Board Certification:
Otolaryngology-Head and Neck Surgery

Medical School:
Medical College of Pennsylvania (1997)

Resident Training:
Medical College of Wisconsin (General Surgery intern, 1997-1998)
Medical College of Wisconsin (Otolaryngology-Head and Neck Surgery resident, 1998-2002)

Oregon Health and Science University (Rhinology/Allergy/Sinus Surgery),
Portland, Oregon (2002-2003)

Director, Rhinology-Sinus Surgery, University of Virginia School of Medicine, Charlottesville, Virginia (2005-2006)

Assistant Professor, Rhinology-Sinus Surgery, University of Virginia School of Medicine, Charlottesville, Virginia (2003-2006)

Professional Organization:
American Academy of Otolaryngology-Head and Neck Surgery, Fellow
American Rhinologic Society, Fellow
American Academy of Otolaryngology Allergy, Member
American Academy of Allergy, Asthma and Immunology, Member
Society of University Otolaryngologist-Head and Neck Surgery

Extensive number of publications and national/international presentations

Ran Vijai Singh, MD Ran Vijai Singh, MD
Neurosurgeon, Sentara Norfolk General Hospital

Assistant Professor of General Surgery, Eastern Virginia Medical School,
Norfolk, Virginia

Neurosurgical Associates
400 Gresham Drive, Suite 200
Norfolk, VA 23507

1788 Republic Road, Suite 100
Virginia Beach, VA 23454

Board Certification:
Diplomate American Board of Neurological Surgery

Medical School:
MLN Medical College, 1980

Residency and Fellowship Training:
Jackson Memorial Hospital at University of Miami, 1995-2000

Clinical Interests:
- Specializing in Complex Spine Surgery
- Fellowship Trained in Neurotrauma
- Fellowship Trained in Vascular & Skull Base Surgery

Joseph L. Koen, MD Joseph L. Koen, MD
Neurosurgeon, Sentara Norfolk General Hospital

Dr. Koen, a native of Ohio, completed his undergraduate studies at The Ohio State University receiving degrees in chemistry and Spanish. He continued at Ohio State earning his M.D. degree in 1993. He then moved to North Carolina to train in neurosurgery at Duke University Medical Center. In 1999 Dr. Koen joined Neurosurgical Specialists, Inc. in Norfolk, Virginia. He is an Assistant Clinical Professor of Surgery at Eastern Virginia Medical School and Instructor in Neurosurgery for the Department of Otolaryngology, Head and Neck Surgery at EVMS. Dr. Koen is certified by The American Board of Neurological Surgery.

Dr. Koen’s professional activities include serving as past Chief of the Department of Neurosurgery at Sentara Norfolk General Hospital. He sits on the governing council for the Sentara Neuroscience Program, and is also the neurosurgical liaison to the Stroke Operations Committee. Since 2000 he has served as Medical Director for both the Brain Tumor Support Group and the Trigeminal Neuralgia Support Group of Hampton Roads.

Dr. Koen specializes in brain tumors, including skull base techniques and stereotactic radiosurgery (Cyberknife, X-Knife). He also has a special interest and expertise in cerebrovascular surgery including aneurysms and arteriovenous malformations (AVM’s). His current emphasis is on minimally invasive neurosurgery for both the brain and the spine. Dr. Koen has performed intracranial endoscopy for brain tumors, cysts, and hydrocephalus since 1995. He also has one of the region’s largest experiences in minimally invasive spinal surgery for both simple and complex conditions, including herniated disc, spinal stenosis, and degenerative disc disease.

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