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Johns Hopkins Pediatric

Meet Our New Neurosurgeons


Louis Chang, M.D.
Assistant Professor of Neurosurgery 

Louis Chang is a neurosurgical spine specialist with expertise in minimally invasive surgery (MIS) for spinal disorders. He treats patients with spinal stenosis, herniated discs, spinal tumors and spinal trauma. Dr. Chang performs a wide range of spinal surgeries, including laminectomies, microdiscectomies, artificial disc replacement and spinal fusions. He also uses minimally invasive surgical techniques, such as tubular microsurgery, lateral lumbar interbody fusion, MIS laminectomy and MIS transforaminal lumbar interbody fusion.

Dr. Chang obtained his undergraduate degree in chemistry from Dartmouth College and his medical degree from the State University of New York Downstate College of Medicine. He completed a neurosurgery residency at the University of Maryland Medical Center and a fellowship in minimally invasive spinal surgery and navigation at the New York-Presbyterian/Weill Cornell Medical Center in New York. 

Dr. Comair sees patients at Johns Hopkins Bayview Medical Center in Baltimore and Suburban Hospital in Bethesda, Maryland.



Youssef G. Comair, M.D.
Professor (PAR) of Neurosurgery 

Youssef Comair is an internationally recognized neurosurgeon and sees patients for a wide range of neurosurgical needs. He offers surgical therapy for diseases of the brain and spine and has pioneered awake craniotomies for resection of intrinsic brain tumors. His surgical expertise also includes epilepsy surgery, deep brain stimulation for Parkinson’s disease and essential tremor, trigeminal neuralgia surgery, radiosurgery, treatment for hydrocephalus and herniated disc repair.

Dr. Comair received his medical degree from St. Joseph University in Beirut, Lebanon, and completed his neurosurgery residency at Montreal Neurological Institute, Mc Gill University. He completed fellowship training in brain tumor and functional neurosurgery at Montreal Neurological Institute.

Dr. Comair sees patients at The Johns Hopkins Hospital in Baltimore and Suburban Hospital in Bethesda, Maryland



Daniel Lubelski, M.D.
Assistant Professor of Neurosurgery
Director of Spine Tumor Surgery, Department of Neurosurgery 

Daniel Lubelski is a fellowship-trained neurosurgeon with expertise in complex spine surgery, including robotic spine surgery, and peripheral nerve surgery. He treats patients with spinal diseases and deformities, spine and nerve tumors, and brachial plexus injuries and other peripheral nerve injuries.

After obtaining his undergraduate degree at the City University of New York, Dr. Lubelski spent a year doing predoctoral research at the National Institutes of Health. He then obtained his medical degree from the Cleveland Clinic Lerner College of Medicine, and he performed stem cell tumor research as a Howard Hughes Medical Institute fellow. Dr. Lubelski went on to the Johns Hopkins University School of Medicine for a neurosurgery residency and an enfolded fellowship in peripheral nerve surgery. His postdoctoral training also included a fellowship in complex spine surgery and spinal oncology at Johns Hopkins, as well as a traveling fellowship with advanced training at the Memorial Sloan Kettering Cancer Center and MD Anderson Cancer Center.

Dr. Lubelski sees patients at The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center in Baltimore, as well as Johns Hopkins Health Care and Surgery Center – Green Spring Station in Lutherville, Maryland.



Risheng Xu, M.D., Ph.D.
Assistant Professor of Neurosurgery 

Risheng Xu is a fellowship-trained neurosurgeon with expertise in cerebrovascular and endovascular neurosurgery, and skull base pathologies. He treats patients with a wide range of cerebrovascular disorders such as cerebral aneurysms, subarachnoid hemorrhage, arteriovenous malformations, arteriovenous fistulas, carotid stenosis, cavernous malformations and moyamoya disease. He also treats skull base tumors such as acoustic neuromas (vestibular schwannomas) and meningiomas, and pain disorders such as trigeminal neuralgia.

Dr. Xu completed his undergraduate studies at Harvard College, and attended medical school at the Johns Hopkins University School of Medicine, where he also obtained a Ph.D., in pharmacology and molecular sciences. He continued his residency training in neurosurgery at Johns Hopkins, and remained there to complete a fellowship in cerebrovascular and endovascular neurosurgery.

Dr. Xu sees patients at The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center in Baltimore.


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