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. He conducts clinical and translational studies to evaluate the safety and efficacy of endovascular treatments for various neurological disorders.

Orlando Diaz, MD

Dr. Orlando Diaz currently serves as a Neurointerventional Surgeon offering advanced techniques in diagnosis and treatment of cerebral vascular diseases. He participates in multiple ongoing medical research concerning aneurysm diagnostics and treatment. He is also a part of the staff at Houston Radiology Associates.

Y. Jonathan Zhang, MD

Dr. 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

Dr. Steve H. Fung is a Neuroradiologist and Assistant Professor of Radiology and Medical Director of the MRI Core. His clinical and research interests include the application of advanced MRI techniques in evaluating diseases of the central nervous system, including brain tumors, cerebrovascular disease/stroke, dementia/neurodegenerative diseases, and epilepsy.

David Chiu, MD

Vascular Neurologist
Dr. Davis Chiu is the medical director of the 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. 

Rajan R. Gadhia, MD
Vascular Neurologist
Dr. Gadhia’s clinical interests include hyper-acute ischemic and hemorrhagic stroke management, neurocritical care, telestroke evaluations, novel neuroimaging, and outpatient primary and secondary stroke prevention. His research interests include end-user perception in telestroke, long term cardiac monitoring and biomarkers of atrial fibrillation, novel MRI sequences for evaluating acute stroke, and pre hospital EMS assessment tools to shrink D2N times.

Vivek Misra, MD, FAHA
Vascular Neurologist
Dr. Misra has a particular interest in the management of acute ischemic and hemorrhagic stroke, telemedicine and stroke recovery therapies. He is board-certified in Neurology and Vascular Neurology by the American Board of Psychiatry and Neurology. He is a member of the American Academy of Neurology, the American Heart Association Stroke Council and the American Neurological Association.

John J. Volpi, MD

Vascular Neurologist
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.

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. Andrew Lee is interested in optic nerve disorders and, in particular, tumors of the optic nerve. He is involved in ophthalmic graduate medical education and in the teaching and assessing of the ACGME competencies.