Matthew Ashley, M.D., J.D.
Chief Medical Officer
Dr. Ashley is responsible for executive oversight of medical programs and development for all clinics in California and Texas. He received his medical and juris doctor degrees from Southern Illinois University. He completed a neurology residency at University of California, Los Angeles, as well as a neurological rehabilitation fellowship at the university’s Neurological Rehabilitation and Research Unit. Having trained at a national stroke center, Dr. Ashley is one of the few neurology and rehabilitation-trained physicians who provide clinical services for postacute care.
Brent E. Masel, M.D.
Executive Vice President of Medical Affairs
A researcher, academician and physician, Dr. Masel is also a Clinical Professor of Neurology at the University of Texas Medical Branch in Galveston. Dr. Masel received his medical degree from the Loyola University School of Medicine, and completed his post-graduate training at the University of Texas Medical Branch. He is a board-certified Neurologist and was in the private practice of Neurology for 16 years. His research on traumatic brain injury has been published in Journal of Neurotrauma and Journal of Clinical Endocrinology and Metabolism. In 2013, Dr. Masel was honored by the Brain Injury Association of America as a recipient of the Sheldon Berrol Award.
Gina P. Armstrong, M.D.
Dr. Armstrong graduated from the American University of the Caribbean School of Medicine and earned a Master of Science degree with honors in all clinical rotations. Dr. Armstrong holds a Bachelor of Science in psychology, cum laude, and has been recognized with honors for her academic excellence. Her fellowship at TIRR Memorial Hermann Hospital in Houston focused on spasticity management and the care of traumatic brain injury and stroke patients.
Ellis Doan, M.D.
As Medical Director of Centre for Neuro Skills’ Austin clinic, Dr. Doan brings his expertise in internal medicine to the treatment for complex stroke and traumatic brain injury patients. He currently serves as Chief Medical Officer of a hospital group and a Medical Director for a skilled nursing facility and has worked in various care settings from a Level 1 trauma center to rehabilitation hospitals. Dr. Doan has been published in several papers and has presented posters at conferences.
Henry Koh, M.D.
Dr. Koh received his M.D. degree at the Chicago Medical School at Rosalind Franklin University of Medicine and Science. He is an attending physician and Rehabilitation Medical Director at Alta Bates Summit Medical Center in Oakland, and an attending at the Veterans Administration in Palo Alto, California. He completed a residency at Stanford University Hospital in Physical Medicine and Rehabilitation after finishing a preliminary residency at Alameda County Medical Center in Oakland. Dr. Koh is certified by the American Board of Physical Medicine and Rehabilitation. His professional interests include inpatient rehabilitation, acquired brain injury, spinal cord injury, and musculoskeletal/sports medicine.
Vibhay Prasad, M.D.
Dr. Prasad is a Physical Medicine and Rehabilitation specialist with 25 years of clinical experience treating stroke and traumatic brain injury. He has served as the Medical Director at the CNS Los Angeles clinic since 2003, providing patient care that supports long term independence. Dr. Prasad’s clinical interest is in combining applied exercise, medical management, and rehabilitation technology to achieve maximal functional outcome for his patients.
Ziba Rezaee, M.D.
As a Medical Director for Centre for Neuro Skills’ Austin clinic, Dr. Rezaee joins a clinical staff dedicated to treating stroke and traumatic brain injury patients. Dr. Rezaee is board-certified in both Psychiatry and Brain Injury Medicine and practices in multiple settings from residential treatment centers to partial hospitalization programs and outpatient clinics. She has had extensive experience in the psychiatric care aspect of neurorehabilitation and brings forth a wealth of expertise.
Omesh Singh, D.O., FACOI
Dr. Singh holds a Bachelor of Arts degree in Biology from University of Texas at Austin and attended the Lake Erie College of Osteopathic Medicine in Bradenton, Florida. He completed his Internal Medicine Residency training at Plaza Medical Center of Fort Worth, where he now is an Associate Professor of Internal Medicine. With an emphasis on stroke treatment and prevention, he also monitors comorbidities that can complicate traumatic and acquired brain injury rehabilitation: hypertension, diabetes, and substance misuse.
Evan Dimmitt, M.D.
Dr. Dimmitt earned his medical degree at St. George’s University School of Medicine in Grenada, West Indies. He graduated magna cum laude from the Keith B. Taylor Global Scholars program in Newcastle, England. Dr. Dimmitt completed a Physical Medicine and Rehabilitation residency at University of Miami-Jackson Memorial Hospital in Florida and completed an internal medicine year at New York Methodist Hospital in Brooklyn. He earned a Bachelor of Science degree in business administration from California Polytechnic State University, where he focused on entrepreneurial management. Dr. Dimmitt holds a medical license with the State of California and is an active member of the American Academy of Physical Medicine and Rehabilitation.