Physicians //

Board Certified in Neurology

Board Certified in Neuromuscular and Electrodiagnositc Medicine Board Certified in Headache Medicine

Board Certified in Acupuncture and Oriental Medicine

Timothy Wei, MD, PhD |



Neuropathy, Headache Medicine, General Neurology

Graduating from the Jiangxi College of Chinese Medicine in 1982, Dr. Wei went on to study at the Institute of Acupuncture, China Academy of Chinese Medical Sciences in Beijing, China, where he graduated in 1985. He practiced in China for several years before coming to the United States, where he achieved his Masters and ultimately PhD at the The Ohio State University in 1996.  He then completed Neurology Residency at the University of Chicago in 2000. He practiced for several years in private practice in Michigan, was an active Clinical Professor at Michigan State University Medical School, and also was Director of the Comprehensive Care Center, Spectrum Health where he managed complex headache and pain patients. He ultimately moved with his wife and daughters to the East Bay, where he founded East Bay Neurology.

Chirag Patel, MD |


Headache Medicine, Concussion Medicine, General Neurology


Dr. Chirag H. Patel is a board certified Neurologist who specializes in headache and concussion medicine. He grew up in Santa Maria, California, before going to the University of California, Los Angeles, for undergraduate education where he majored in Neuroscience. Afterwards, he attended the University of California, Davis, School of Medicine for his medical degree, and subsequently did his Neurology training at the University of Southern California. He also did his subspecialty fellowship training in Headache Neurology at the University of Southern California. He is excited to be in the East Bay with his wife and daughter. He is passionate about headache medicine and hopes to establish East Bay Neurology as a premier West Coast headache center.

Board Certified in Neurology

Board Certified in Headache Medicine

Jason Massa, DO |



Movement Disorders, General Neurology


Dr. Jason Massa is a board certified Neurologist specializing in Movement Disorders, with particular interest in the comprehensive treatment of patients with Parkinson’s Disease. Dr. Massa grew up in Pittsburgh, Pennsylvania, where he attended Carnegie Mellon University for his undergraduate degree in Psychology. The pursuit of a medical career brought him to Northern California, where he attended Touro College of Osteopathic Medicine.  He completed his residency training at Kaiser Permanente in Los Angeles and Fellowship training in Movement Disorders at the University of Pittsburgh Medical Center.  Dr. Massa’s fellowship training focused on the diagnosis and management of Parkinson’s Disease and Dystonia, including the use of deep brain stimulation and botulinum toxin.  Additionally, he engaged in research into the relationship between genetics and environmental factors in the development of Parkinson’s Disease.

Board Certified in Neurology

Board Certified in Movement Disorders

Tanya Jain Gupta, MD, MS | Board Eligible in Neurology


General Neurology


Dr. Tanya Jain Gupta is a neurologist who recently joined East Bay Neurology in 2021. She grew up in Saratoga, California. She earned a B.S in Physiological Sciences and B.A. in Dance from University of California, Los Angeles, and afterwards completed a Master of Science degree in Biokinesiology at University of Southern California. Afterwards, she attended medical school at the Keck School of Medicine of USC, and completed her neurology residency training at USC. In addition to her training as a neurologist, she has additional training and certifications in exercise medicine, nutrition, integrative medicine, and is a national board certified health and wellness coach. She believes strongly in taking a multifactorial approach to promote the well being of her patients, and is thrilled to return home to the Bay Area to serve her community.

Erin Green-Krogmann, PhD, ABPP-CN | Board Certified in Clinical Neuropsychology




Dr. Erin Green-Krogmann completed her bachelor’s degree in Biopsychology from the University of California, Santa Barbara, and went on to earn her doctorate from the San Diego State University (SDSU) / University of California San Diego (UCSD) Joint Doctoral Program in Clinical Psychology.  During her pre-doctoral internship and postdoctoral fellowship at the VA Palo Alto and Stanford University School of Medicine she completed specialized training in neurorehabilitation and neuropsychological consultation. In addition to her clinical work, she has 16 peer-reviewed scientific publications focused on relationships among aging, risk factors for cerebrovascular disease (e.g., obesity, metabolic syndrome) and brain function using neuroimaging and cognitive assessment methods. As of 2021, she is one of only 8 board certified neuropsychologists in the East Bay Area. Dr. Green-Krogmann is excited to join the team at East Bay Neurology to provide neuropsychological assessment services.

Lauren Johnson, NP, MS | Licensed Nurse Practitioner


Headache, General Neurology


NP Lauren Johnson earned her BA in Psychology from University of Delaware, a Master of Social Work at Temple University in Philadelphia and a Master of Science in Nursing from the University of California San Francisco (UCSF). While at UCSF, she pursued a Neurology residency with the Memory and Aging Center and East Bay Physicians Group. She also worked on Neuropsychological clinical research with the Department of Anesthesia at UCSF. She has an additional two years of experience specializing in Pain Management and Spine disorders as well as five years working in acute Psychiatry. Her passion is to provide holistic, individualized treatment of neurological disorders focusing on the promotion of optimum health outcomes for her patients.


Maridez Jenkins, NP, MS | Licensed Nurse Practitioner


Headache, General Neurology


NP Maridez Jenkins achieved a B.S. in Psychology-Biology and B.A. in Communications at University of California, Davis and completed a Master of Science in Nursing at Samuel Merritt University. With a foundational training in family practice, Maridez has worked in various specialties and clinical settings, allowing her to have a comprehensive knowledge base. Her experience in family practice/internal medicine, gastroenterology, endocrinology, anesthesia/pain management, and neurology has fostered an eclectic practice background that values holistic, evidence-based, individualized, and compassionate care for patients with complex conditions and chronic pain..