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Faculty & Staff

Photo of Dr. Ali Bydon, M.D.

Bydon, Ali, M.D.

Associate Professor of Neurosurgery
Co-Director of Neurosurgery Medical Student Education
Director of Neurosurgery Undergraduate Student Education
Director of Spinal Outcomes and Biomechanics Laboratory
Clinical Director of Spine Program at Johns Hopkins Bayview Medical Center
 
Photo of Dr. Kaisorn Lee Chaichana, M.D.

Chaichana, Kaisorn Lee, M.D.

Assistant Professor of Neurosurgery
Assistant Professor of Oncology
Assistant Professor of Otolaryngology - Head and Neck Surgery
 
Photo of Dr. Geoffrey Philip Colby, M.D., Ph.D.

Colby, Geoffrey Philip, M.D., Ph.D.

Assistant Professor of Neurosurgery
Assistant Professor of Neurology
Assistant Professor of Radiology and Radiological Science
 
Photo of Dr. Alexander Lewis Coon, M.D.

Coon, Alexander Lewis, M.D.

Assistant Professor of Neurosurgery
Assistant Professor of Neurology
Assistant Professor of Radiology and Radiological Science
Director of Endovascular Neurosurgery
Director of Endovascular Neurosurgery Fellowship Program
 
Photo of Dr. Judy Huang, M.D.

Huang, Judy, M.D.

Professor of Neurosurgery
Director, Department of Neurosurgery, Johns Hopkins Bayview Medical Center
Director of Cerebrovascular Neurosurgery, Johns Hopkins Bayview Medical Center
Director, Neurosurgery Residency Program
Director, Cerebrovascular Neurosurgery Fellowship Program
Co-Director, Multidisciplinary Adult Cranioplasty Center
 
Photo of Dr. Mark Gregory Luciano, M.D., Ph.D.

Luciano, Mark Gregory, M.D., Ph.D.

Professor of Neurosurgery
Professor of Pediatrics
Director of the Cerebral Fluid Center
 
Photo of Dr. Michael R. Raber, M.D.

Raber, Michael R., M.D.

Instructor of Neurosurgery
 
Photo of Dr. Samuel Michael Taylon, M.D.

Taylon, Samuel Michael, M.D.

Instructor of Neurosurgery
 
Photo of Dr. Nicholas Theodore, M.D.

Theodore, Nicholas, M.D.

Director, Neurosurgical Spine Center
 
Photo of Dr. Timothy Francis Witham, M.D.

Witham, Timothy Francis, M.D.

Associate Professor of Neurosurgery
Associate Professor of Orthopaedic Surgery
Director, the Johns Hopkins Neurosurgery Spinal Fusion Laboratory
Director, Johns Hopkins Bayview Medical Center's Spine Program
Co-Program Director, Johns Hopkins Neurosurgery Residency Program
 

Jared Abay, MS, PA-CJared Abay, MS, PA-C

Jared Abay, MS, PA-C, is a senior physician assistant in the Department of Neurosurgery at Johns Hopkins Bayview. He earned an undergraduate degree at George Washington University, where he also completed physician assistant training. Abay also earned a master of science with emphasis in neurosurgery at the University of Nebraska and completed a physician assistant surgical residency program at Sinai Hospital in Baltimore.

Elina DeFranceschi, MS, PA-CElina DeFranceschi, MS, PA-C

Elina DeFranceschi, MS, PA-C, is a physician assistant in the Department of Neurosurgery at Johns Hopkins Bayview Medical Center. After earning a bachelor of science degree in neuroscience with a minor in healthcare and society from Lafayette College, she earned a master of science degree in physician assistant studies at Jefferson College of Health Sciences in Roanoke, Virginia.

Christina Hughes, MMS, PA-C

Christina Hughes, MMS, PA-C

Christina Hughes, MMS, PA-C, is a physician assistant in the Department of Neurosurgery at Johns Hopkins Bayview Medical Center. After earning bachelor's degrees in neurobiology and biobehavioral psychology at the University of Vermont, she earned a master's of medical science in physician assistant studies at Arcadia University in Philadelphia, Pennsylvania.

Yerin Kay, MPAS, PA-CYerin Kay, MPAS, PA-C

Yerin Kay, MPAS, PA-C, is a physician assistant in the Department of Neurosurgery at Johns Hopkins Bayview Medical Center. After earning a bachelor degree in chemistry at Carnegie Mellon University, she earned a master's in physician assistant studies at Chatham University in Pittsburgh, Pennsylvania.

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