Steven Jay Holtz , MD- Retired
Steven J. Holtz, MD graduated from Boston University in 1972 cum laude and received his medical doctorate from the Boston University School of Medicine in 1974. After finishing an internal medicine internship and one year of residency at the Kaiser Foundation Hospital in Oakland, California, Dr. Holtz returned to Boston for specialty training in neurology.

In 1979 Dr. Holtz moved back to the Bay Area and with J.B. Drori, MD founded the Neurology Medical Group of Diablo Valley. Dr. Holtz is also Associate Clinic Professor of Neurology at the University of California, San Francisco, where he has taught for over 23 years. Dr. Holtz has been elected President of the Association of Clinical Faculty at UCSF for 2005. He also teaches at the University of California, Berkeley and has taught at the Samuel Merritt College in Oakland, CA.

Dr. Holtz has lectured extensively on a number of neurological subjects throughout the country for over 18 years. He has been the course director for the program, “The Neurologist as an Expert Witness” at the yearly meetings of the American Academy of Neurology between 1998 and 2002.

Dr. Holtz's Curriculum Vitae
Janet Lin, MD
Dr. Janet Lin graduated from Antioch College with a BA in literature in 1972 and received her MD from the University of Medicine and Dentistry in Newark New Jersey in 1977. She did her internship in internal medicine and a neurology residency at the same institution. She joined the Neurology Medical Group in 1981 and has a special interest in Multiple Sclerosis.

Dr. Lin's Curriculum Vitae
Raymond Stephens, MD
Dr. Ray Stephens is originally from the San Francisco Bay area and completed college at University of California, Berkeley with an AB in Physiology with Honors in 1974. He subsequently completed medical school at University of California, San Diego in 1978. He completed a medical internship at University of Michigan in Ann Arbor in 1979. His Neurology residency was completed at University of California, San Diego in 1982. He has remained in private practice with Neurology Medical Group of Diablo Valley since 1982. He has received Board Certifications as below:
  • American Board of Qualification in Electroencephalophy-EEG 1982
  • American Board of Psychiatry and Neurology-Neurology 1984
  • American Board of Electrodiagnostic Medicine- EMG and Neuromuscular Disease 1986
  • American Board of Psychiatry and Neurology- Vascular Neurology 2008
He maintains membership in the American Academy of Neurology, and the American Association of Electrodiagnostic Medicine. He is currently co-director of the Stroke Program at the John Muir-Mt. Diablo Health System Neurosciences Institute and maintains a special interest in stroke and vascular disease. He is the Director of Clinical Research for Neurology Medical Group of Diablo Valley.

Dr. Stephen's Curriculum Vitae
Brad Volpi, MD
Brad Volpi was born in Chicago and moved to the Bay Area at age 10, graduating Phi Beta Kappa from UC Berkeley. He went back east for medical training, first to University of Connecticut for medical school, and after a rotating internship and four years as a general practitioner in the National Health Service in rural North Carolina, he returned for residency training and an epilepsy fellowship at Yale.

He fulfilled his long-term wish of returning to the Bay Area to practice Neurology in 1987.

Dr. Volpi's Curriculum Vitae
Steven Schadendorf, MD
Dr. Steven Schadendorf was born and raised in Omaha, Nebraska and received a B.A. in Psychology from Creighton University. He received his medical degree from the University of Nebraska Medical Center. He then moved to Houston for his internship and neurology residency at Baylor College of Medicine, where he served as Chief Resident in Neurology from 2004 to 2005. In 2006, he completed a one year fellowship in Neurophysiology at Baylor. In 2006, he moved with a his wife, a pediatric neurologist from the Bay Area, in order to be close to family and begin his career with the Neurology Medical Group of Diablo Valley.

Dr. Schadendorf"s Curriculum Vitae
Leslie Gillum, MD, MPH

Dr. Leslie Allison Gillum grew up in Virginia and received a BA in Biology from the University of Virginia (1995). At the University of California San Francisco she received her medical degree (2000), served her internship (2002) and neurology residency (2005), and completed a fellowship in Spine Neurology (2006). Her Master’s in Public Health in Epidemiology (2001) was obtained from the University of California Berkeley. She is a diplomate of the American Board of Psychiatry and Neurology and also the American Board of Electrodiagnostic Medicine. From 2005-2009, she worked exclusively as neurology clinical faculty at UCSF and participated in NIH-based research.
In 2009, Dr. Gillum happily left her across-bay commute behind and joined the Neurology Medical Group of Diablo Valley as a full-time general neurologist. She has served as NMG's Managing Partner since 2011. She truly enjoys caring for all types of neurologic illnesses:  stroke, Parkinson's, MS, migraine, myasthenia, neuropathy, etc.  She still values practicing her subspecialty in spine neurology helping neurosurgeons and orthopedic spine surgeons, generalist and rehabilitation physicians, and patients determine if neurologic symptoms are attributable to anatomic spine disease (disc herniation, spinal stenosis, etc) versus other neurologic illness. She maintains close UCSF ties and volunteers her time teaching medical students.

Dr. Gillum's Curriculum Vitae

Robert Algar, MD
Dr. Robert Chance Algar graduated from the University of the South, Sewanee in 1995 with a BA in Literature and completed his medical degree at Vanderbilt University Medical School in 1999. From 1999 to 2003 he completed residency training in Neurology at New York Hospital (Weill Medical College, Cornell University) and Memorial Sloan-Kettering Cancer Center.

He was selected to serve as Chief Resident for Neurology for 2002-2003. In 2004, he completed additional training in Neurophysiology (EMG, Nerve Conduction Studies and EEG) at New York Hospital and the Weill-Cornell Peripheral Neuropathy Center. He joined the Neurology Medical Group of Diablo Valley in 2004 and maintains a special interest in peripheral neuropathy.

Dr. Algar's Curriculum Vitae
Melissa Lehmer, MD. MPH
Dr. Melissa Lehmer grew up in Pennsylvania and earned a BA in Psychology from Boston University. She went on to do an MPH in Social and Behavioral Sciences, also at Boston University, before moving across the country to earn an MD from the University of Southern California. She completed her neurology residency at the University of California, San Diego and stayed on to do a fellowship in Geriatric Neurology and Dementia. She then moved with her family to the Bay Area to begin her career with the Neurology Medical Group of Diablo Valley. She looks forward to helping you with your neurologic needs in the office.

Dr. Lehmer's Curriculum Vitae
Negar Sodeifi, MD

Dr. Sodeifi is a board certified neurologist who specializes in epilepsy. She was born in Tehran, Iran, received her medical degree in 2003 from the Shahid Beheshti University of Medical Sciences, and worked as Staff physician at the Emergency Department for 2 years. After her initial training, Dr. Sodeifi moved to the United States in 2006 to continue her education. She completed her Neurology residency at West Virginia University (WVU) in 2012 and completed additional training in Clinical Neurophysiology (Epilepsy Track) at the University of Virginia (UVa) in 2013. Dr. Sodeifi is currently board certified in both Neurology and Clinical Neurophysiology.

In 2014, Dr. Sodeifi moved with her husband, who practices Family Medicine and Psychiatry, to the Bay area to begin her Career with the Neurology Medical Group of Diablo Valley. She looks forward to helping you with all of your neurologic needs with a special interest in Epilepsy.

Dr. Sodeifi's Curriculum Vitae

Luwam Wolana, PA-C

PA-C Luwam Wolana earned her BA in Biology & chemistry from San Jose State University. She worked in clinical research & drug development for various cancers & HIV for three years. She then attended Samuel Merritt University where she earned her Masters of Physician Assistant (Associate). She completed PA school & joined Neurology Medical Group of Diablo Valley in January 2014. She is excited & passionate about working as a Neurology PA & looks forward to helping you with your Neurological needs.

Luwam Wolana Curriculum Vitae


Zulliana Ortega, Brooke Leite, Helen Burkhart

Janice Stephens, RN, BSN
Peggy Newsom, RN, BSN
Tish Murphy, RN, MBA