Stanford Headache and Facial Pain Program Team

Robert P. Cowan, MD, FAAN, FAHS
Higgins Family Professor, Neurology & Neurological Sciences and, by courtesy, Clinical Professor of Anesthesiology

Dr. Robert Cowan is Higgins Family Professor of Neurology and Director of the Headache Program at Stanford University. Prior to joining Stanford he was the founding medical director of the Keeler Center for the Study of Headache (Ojai, CA) and senior clinical research scientist in molecular neurobiology at Huntington Medical Research Institutes (Pasadena, CA). Prior to that he founded and directed the Headache program at the University of Southern California, Keck School of Medicine.

Dr. Cowan attended University of Southern California, Keck School of Medicine, completed a residency program at USC Department of Neurology and served on faculty there until 2000. He is Board Certified in the areas of: Psychiatry and Neurology and Pain Medicine. He also holds subspecialty certification in Headache Medicine.  Dr. Cowan is widely published in various scientific journals, including the Journal of the American Medical Association, Cephalalgia, and Headache. In addition, Dr. Cowan has held several nationally elected positions, including chair of the section on Chronic Daily Headache for the American Headache Society. He is past-President of the Headache Cooperative of the Pacific, a fellow of the American Academy of Neurology and the American Headache Society.  He sits on the boards of the Alliance for Headache Diseases Advocacy and the Headache Cooperative of the Pacific. He is an ad hoc reviewer for a variety of journals, and an active mentor in the Stanford BioDesign Program.

Niushen Zhang, MD, FAHS
Clinical Assistant Professor, Neurology & Neurological Sciences

Dr. Zhang is a board certified neurologist and clinical assistant professor in the Department of Neurology. She has a special interest in developing personalized treatment plans, for headache patients, that incorporate the use of complementary and integrative medicine. She is the Chair of the Complementary and Integrative Medicine Special Interest Section of the American Headache Society. Her research interests include participating in clinical trials of new headache treatments for migraine and cluster headache. Dr. Zhang is also actively involved in medical education. She is the Director of the Headache Fellowship Program at Stanford.

Dr. Zhang graduated from Yale University with a Bachelor of Science degree in Molecular, Cellular and Developmental Biology. She attended New York University School of Medicine. She completed neurology residency and fellowship in headache and facial pain at Stanford University.

Nada Hindiyeh, MD
Clinical Assistant Professor, Neurology & Neurological Sciences

Nada Hindiyeh, M.D., is a board certified neurologist and a clinical assistant professor in the department of Neurology.  

She was awarded the 2013 Clinical Research Fellowship in Neurotoxins by the American Academy of Neurology and under this scholarship is currently investigating a diagnostic screening protocol for chronic migraine. Other research interests include pathophysiology and novel treatments for migraine, the use of transcranial magnetic stimulation in headache disorders, and participation in clinical trials for new headache therapeutics. She is currently a member of the American Headache Society as well as the International Headache Society.

Dr. Hindiyeh completed her medical degree at the University of Toledo College of Medicine in Toledo Ohio. Both her internship and neurology residency were completed at the University of California, Irvine, Medical Center, where she was chief resident. She completed her fellowship in headache and facial pain at Stanford University School of Medicine.

Addie Peretz, MD
Clinial Assistant Professor, Neurology & Neurological Sciences

Addie Peretz, MD, is a board certified Neurologist and a Clinical Assistant Professor of Neurology & Neurological Sciences. Her clinical interests focus on the diagnosis and treatment of headache and facial pain conditions. She is involved in medical education and received the Robert S. Fisher Teaching Award for excellence in neurology resident teaching of medical students at Stanford in June of 2015. Her research interests include understanding the biological underpinnings of migraine and chronic daily headaches. She also participates in clinical trials of new headache treatments. She is currently a member of the American Headache Society as well as the International Headache Society.

Dr. Peretz received her bachelor's degree in Neuroscience at Brown University and earned her medical degree at the New York University School of Medicine. She completed her internship at Georgetown Medical Center in Washington, DC, followed by residency in Neurology and fellowship in Headache and Facial Pain, both at Stanford University.

Meredith Barad, MD
Clinical Associate Professor, Anesthesia

Dr. Meredith Barad is a Clinical Associate Professor, Anesthesia (Pain Management) and Neurology and Neurological Sciences, at Stanford Hospital & Clinics. She is also co-Director of the Facial Pain Program. She is also the Associate Program Director of the Pain Fellowship.  Her current clinical research involves the treatment of headache and facial pain in the context of concurrent chronic pain. Dr. Barad also has a strong interest in medication overuse headache and the use of a multi-disciplinary program for treatment.

Dr. Barad attended Stanford University Medical School and completed her residency at Stanford Hospital and Clinics where she was Chief Resident of Neurology. She is board certified in the areas of Neurology, Pain Medicine and Headache Medicine and holds memberships with the American Academy of Neurology, American Headache Society, and the American Academy of Pain Medicine where she is the chair of the Headache and Orofacial Pain Special Interest Group. She is on the board of the American Interventional Headache Society.

Yohannes Woubishet Woldeamanuel, MD
Instructor, Neurology & Neurological Sciences

Dr. Woldeamanuel obtained his M.D. from Addis Abäba University Medical Faculty in January 2007. Following graduation, Dr. Woldeamanuel was Head of Department of Anatomy, Histology, Embryology at Jimma University School of Medicine where he successfully instructed medical students and other health profession disciplines for a year and a half. Afterwards, he did Clinical Neurology residency training at Addis Abäba University Medical Faculty combined with Basic Science and Clinical Research Fellowships concentrating in the areas of Neuroinfectious Diseases, Neuropathic Pain, Epilepsy, and Neuroepidemiology at Karolinska Institutet - Sweden, Albert Einstein College of Medicine - USA, University of Heidelberg - Germany, and Imperial College London - UK. He completed his PostDoctoral Fellowship in Headache Medicine at the Stanford Headache Program. He is Awardee of several prestigious Fellowships, namely, the International Brain Research Organization (IBRO) John G. Nicholls 2012, International Association for the Study of Pain (IASP) Scan|Design Foundation 2010, European Neurological Society (ENS) 2011, and International Headache Society (IHS) 2014. He also has vested interest and expertise in Digital Health as shown by his recent developments of clinically-validated self-management apps for neuropathy (CHANT) and migraine. He has strong track record of publishing many peer-reviewed first-authored articles in several high impact medical journals including The Lancet Oncology, Neurology, Pain, Journal of Neurology, Cephalalgia, and Journal of Neurological Sciences. While serving as Head of Department in Human Anatomy at Jimma University, he successfully trained medical students for two years from 2007 - 2009. Dr. Woldeamanuel’s track of strong, productive, industrious, and entrepreneurial leadership skills has enabled him to team up with colleagues and found Propria Health Solutions Co. where he is the Founder and CEO. Dr. Woldeamanuel consults for his clinic in Addis Abäba, Advanced Clinical & Research Center, where he provides his expertise to neurological and general medical patients.

Danielle D. DeSouza, MSc, PhD
Instructor, Neurology & Neurological Sciences

Danielle DeSouza, PhD, is a neuroscientist in the Department of Neurology & Neurological Sciences. Her research focuses on the use of neuroimaging methods to study brain abnormalities and treatment-related plasticity in patients with chronic daily headache.  Her overall research goal is to combine multimodal neuroimaging approaches to understand the basic mechanisms and biomarkers underlying headache phenotypes to inform individual treatment strategies. Her additional ongoing projects aim to understand the central mechanisms of chronic pain associated with Lyme disease using magnetic resonance imaging and quantitative sensory testing and the role of neuroinflammation in the chronic facial pain disorder, trigeminal neuralgia.

Dr. DeSouza received her bachelor’s degree from the University of Toronto in Neuroscience and Psychology. She completed her master’s degree in rehabilitation science and received her PhD from the University of Toronto’s Institute of Medical Science and Neuroscience Collaborative program.


Leon Moskatel

Dr. Leon Moskatel is trained in Internal Medicine and is excited to bring that perspective to Headache Medicine. He obtained his Bachelor of the Arts from Columbia University and his medical degree at the Keck School of Medicine of the University of Southern California.

During that time, he also researched organic chemistry and microbial metabolism at the California Institute in Technology. He completed his Internal Medicine residency at Scripps Mercy Hospital in San Diego, where he served as president of the Residency Advisory Committee. His research interests focus on the overlap between health economics and headache medicine. His 2019 paper “Did UberX reduce ambulance volume?” received national attention.

Liza Smirnoff, MD

Liza Smirnoff is joining the Headache fellowship after completing residency at LAC+USC Medical Center in Los Angeles, internship at UC Irvine Medical Center, and medical school at FIU Herbert Wertheim College of Medicine in Miami, Florida. Her previous research interests have included calcium signaling in Alzheimer’s model mice, stroke risk and alcohol in Puerto Rico, and use of Zonisamide in Cluster Headaches. Her passions in medicine include holistic care of the mind and body for each patient, women’s health, and education. 

She is originally from Russia, and has lived between Ohio, California and Florida. Liza speaks Russian, poor French and Spanish that she learned in medical school and mastered in residency. She spends her free time making pottery, hiking and hanging out with her poodle Titus. 

APPs & Staff

Carol A. Barch, MN, FNP-BC
Lead Advanced Practice Provider

Carol received her bachelor's degree in nursing from Wayne State University, and a master's and post-master's nursing degree from Emory University. She is a board-certified family nurse practitioner, has received national specialty certification in critical care nursing and neuroscience nursing, and a member of the American Headache Society.

Carol has been nationally recognized for her work in cerebrovascular disease. Over the years, she has made several national and local presentations, published multiple articles and consulted in North America on health care systems providing acute stroke care. Recently, Carol transitioned to bring her expertise to the Stanford Headache and Facial Pain clinic, expanding her scope of practice.

As a nurse practitioner on the team, she provides follow-up care to patients working to meet their goals in medication and lifestyle management for headache and facial pain. Her areas of interest include integrative medicine and patient education.

Anna Viet MSN, FNP-C
Nurse Practitioner
Adult Headache, Pediatric Concussion

Anna Viet is a certified Family Nurse Practitioner that currently supports the headache division in the Department of Neurology.  She obtained her bachelor’s degree in nursing from the University of California, Irvine and started her nursing career in their medical center’s Intensive care unit. She then moved on to join the Intensive Care team at Stanford and was recruited to help build the Concussion Clinic at Stanford and Stanford Children’s Health as an RN coordinator.

She obtained her masters and family nurse practitioner degree from Holy Names University and continues to supports both the Headache and Facial Pain Clinic at Stanford as well as the Concussion Clinic at Stanford Children’s Health. Her interests are in traumatic brain injury and headache management. She is currently a member of the American Headache Society, American Academy of Neurology and the American Association of Nurse Practitioners.  

Michelle Krzanich, SCPM

Michelle received her bachelors in Public Relations, with a minor in Sociology, from San Jose State University. She is a Stanford Certified Project Manager (SCPM) and has been working in the Stanford umbrella since 2013. She started with the School of Engineering and then moved to the School of Medicine. As of May 2018, she joined the Department of Neurology and Neurological Sciences at Stanford Neurosciences Health Center.