Team Members

Gavin W. Britz, MD, MPH, MBA, FAANS

Dr. Gavin W. Britz is Professor and Chairman of the Department of Neurological Surgery. He leads an acclaimed team of neurosurgeons and affiliated professionals and is recognized as one of the nation's foremost cerebrovascular, skull base and brain tumor surgeons and is included in the “Masters of Neurosurgery” book.

Richard P. Klucznik, MD

Dr. Klucznik is Director of Interventional Neuroradiology at Houston Methodist Hospital. He has served on numerous committees including the Medical Staff Quality Management Committee, Neurology Care Management Performance Improvement Subcommittee and the Quality Assurance Committee for Endovascular, which he chaired in 2006.

Orlando Diaz, MD

Dr. Orlando Diaz is board certified by the American Board of Radiology and holds a certificate of added qualifications in neuroradiology. Formerly an assistant professor in interventional radiology at Baylor College of Medicine and chief of interventional neuroradiology at Ben Taub General Hospital. He is the program director of the Houston Methodist Hospital Interventional Neuroradiologist Fellowship within the Radiology Department. He is also a part of the staff at Houston Radiology Associates.

Y. Jonathan Zhang, MD

Dr. Y. Jonathan Zhang specializes in comprehensive treatment of cerebrovascular disorders, including aneurysm, arteriovenous (AV) malformation, dural and spinal AV fistula, carotid cavernous fistula, cavernous malformation, extracranial and intracranial arterial stenosis or occlusion, hyperacute stroke, and intracranial hemorrhage, with endovascular (catheter based), and open microsurgical techniques, as well as stereotactic radiosurgery.

Steve Fung, MD

Steve H. Fung, M.D. is a Neuroradiologist and Assistant Professor of Radiology at the Houston Methodist Neurological Institute and Medical Director of the MRI Core at the Houston Methodist Research Institute. Dr. Fung’s clinical and research interests include application of advanced MRI techniques in evaluating diseases of the central nervous system, including brain tumors, cerebrovascular disease/stroke, dementia/neurodegenerative diseases, and epilepsy. He provides functional MRI and diffusion tensor tractography for planning of neurosurgical cases.

David Chiu, MD - Vascular Neurologist

Elizabeth Blanton Wareing Chair
Dr. Chiu is medical director of the Houston Methodist Eddy Scurlock Stroke Center. He serves on the board of directors for the American Heart Association and is an active member of the American Academy of Neurology, American Heart Association Stroke Council, Texas Medical Association and Harris County Medical Association. He is also a reviewer for Stroke and Journal of Neurology, Neurosurgery and Psychiatry.

John J. Volpi, MD - Vascular Neurologist

Co-Director, Eddy Scurlock Stroke Center
Dr. Volpi is board certified by the American Board of Psychiatry and Neurology for Adult Neurology, and in Neurosonology (including physics, carotid and transcranial Doppler) by the American Society of Neuroimaging (UCNS approved).

Jenny Lai, MD

Dr. Jenny Lai’s primary interests include neurologic rehabilitation for stroke, multiple sclerosis and brain injury survivors as well as spasticity management with Botox and Baclofen pumps. Dr. Lai also has extensive experience with neurobehavioral issues in neurologic conditions.

Lawrence Nguyen, MD

Dr. Lawrence Nguyen’s clinical focus includes musculoskeletal, spine, and conservative pain management in addition to general conditioning, nutrition, and obesity management. He also performs EMGs, trigger point and joint injections.

Teresa D. Kaldis, MD

Dr. Teresa Kaldis’ clinical focus is primarily hospital based care for patients with neurologic and orthopedic diagnosis. She has a special interest in multiple sclerosis, polio, Parkinson’s disease and neuromuscular disorders.

Purvi Desai, MD

Dr. Purvi Desai’s clinical focus is hospital based care of stroke, amputee, neurological spinal cord, orthopedic, and brain injury patients in addition to spasticity, musculoskeletal, and pain management.

Andrew G. Lee, MD

Dr. Lee is a Professor in the Departments of Ophthalmology, Neurology and Neurosurgery, Weill Cornell Medical College. He is a Neuro-ophthalmologist and is the Chairman of the Department of Ophthalmology at Houston Methodist Hospital. He is also an adjunct Professor of Ophthalmology at the University of Iowa. Dr. Lee came to Houston Methodist Hospital after serving on the faculty at both the University of Iowa, Baylor College of Medicine and the M.D. Anderson Cancer Center in Houston, Texas.

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