Meet The Team

The Hoag Epilepsy Center has a multidisciplinary approach to treatment. The team includes highly specialized neurosurgeons, neurologists, neuropsychologists, psychiatrist, nurse practitioners, nurses, neurodiagnostic technologists and social workers to assist in the needs of each individual patient.

David Millett, M.D., Ph.D.

Program Director, Epilepsy

Dr. Millett is a board-certified neurologist specializing in seizures, epilepsy and electroencephalography (EEG). He received his B.A. from the University of California, Los Angeles (UCLA) and obtained both his M.D. and Ph.D. in 2001 from the University of Chicago. Dr. Millett returned to his native Southern California for his medical internship, neurology residency and two-year subspecialty training fellowship in Epilepsy and EEG at UCLA.

In 2007, Dr. Millett joined the faculty of Keck School of Medicine at USC and was given the task of establishing an epilepsy monitoring program to provide advanced epilepsy care for thousands of underserved patients within the Los Angeles Department of Health Services. Under Dr. Millett's guidance, the epilepsy program at Rancho Los Amigos National Rehabilitation flourished, providing an array of services such as inpatient video-EEG monitoring, intracranial video-EEG monitoring, neuroimaging, neurocognitive evaluation, and epilepsy surgery. This program received a special Merit Award from the County of Los Angeles in 2011, the same year Dr. Millett was recognized as the Earl I. Feldhorn Pediatric Epilepsy Faculty at the Keck School of Medicine at USC for his efforts to provide advanced epilepsy care to children with epilepsy.

Dr. Millett relocated to the Pickup Family Neurosciences Institute in 2014 where he is the director of the epilepsy program, and maintains an active role in research and education through his position as Adjunct Assistant Professor of Clinical Neurology in the Keck School of Medicine in USC. He is currently involved in numerous epilepsy-related research studies and educational projects including the use of brain-computer interface (BCI) technologies to analyze epileptogenic circuits in the human hippocampus and the cortical control movement with colleagues at USC and UCI. Dr. Millett is also completing a book on the role of electroencephaolography in the historical development of neuroscience, and he is developing a Web-based Atlas of EEG for training and education.

James D. Park, D.O.

Neurologist and Epileptologist

James Park, D.O., is a board-certified neurologist and epileptologist – a neurologist who specializes in the diagnosis and treatment of seizures. He completed his fellowship at Thomas Jefferson University Hospital in Philadelphia, one of the top epilepsy programs in the country. While there, he encountered some of the most complex cases and honed his skills in the evaluation and planning of epilepsy surgeries. He brings that passion and expertise to the Hoag Epilepsy Program, where he works to provide the most comprehensive and compassionate care for the patients of Orange County.

He received his medical degree at Touro College of Osteopathic Medicine in New York City. He completed his neurology residency at University of Maryland Medical Center in Baltimore and then both a clinical neurophysiology and epilepsy fellowship at Thomas Jefferson University Hospital.

Andrew Ly, M.D.

Program Director, Neurophysiology Services

Dr. Ly earned his medical degree from Chicago Medical School. He completed his neurology residency at Los Angeles General Hospital–University of Southern California Medical Center and completed a neurophysiology fellowship at USC University Hospital.

Dr. Ly directs the Neurophysiology and Epilepsy testing services at Hoag Hospital and brings an integrated approach to field epilepsy and seizure disorders. He works with a multidisciplinary team at the Hoag Epilepsy Center to provide an individualized comprehensive plan to the evaluation, diagnosis, and medical and surgical treatments of epilepsy.

Dr. Ly also provides extensive experience and expertise in the area of neurodiagnostic testing. This includes electromyelography and nerve conduction studies (EMG/NCS) for the diagnosis and treatment of nerve and muscle disorders. In addition, he leads a team in providing Intraoperative Monitoring (IO M) services during spine and brain surgeries to preserve and minimize neurological damage after surgery.

Vivek Mehta, M.D.


Dr. Vivek Mehta is a neurosurgeon with expertise in complex and minimally invasive brain and spine surgery. He is a member of the Hoag Epilepsy Surgery Program at the Pickup Family Neurosciences Institute. Dr. Mehta was raised in Orange County and completed medical school with Alpha Omega Alpha Honors at The Johns Hopkins University School of Medicine.

In college, Dr. Mehta was named to the USA Today All-Academic First Team as one of the top 20 college students in the United States. After completing medical school, Dr. Mehta completed advanced training in neurosurgery at the University of Southern California under Drs. Michael Apuzzo, Martin Weiss, Gordon McComb and Steven Giannotta; and in Epilepsy and Stereotactic Neurosurgery with Dr. Charles Liu. Prior to joining Hoag, Dr. Mehta was on staff at the University of Southern California as an attending neurosurgeon at Los Angeles County and USC Medical Center, the nation’s busiest Level 1 neurosurgery trauma center. He is an Adjunct Assistant Professor of Clinical Neurosurgery at the USC Keck School of Medicine.

Jason Muir, M.D.

Program Director, Neurophysiology Services

Dr. Muir is a neurologist with special training and interest in epilepsy, sports neurology and nerve/muscle disorders. He attended medical school at the USC Keck School of Medicine after receiving his undergraduate degree at Occidental College where his interests included Biology and Neurobiology. Subsequently, he trained in internal medicine at SUNY Downstate in Brooklyn before returning to USC Keck School of Medicine to complete residency training in Neurology and subspecialty fellowship training in Neurophysiology.

During his Neurophysiology fellowship, Dr. Muir was directly involved with the care of epilepsy patients; guiding them through the evaluation to determine treatment options including new or experimental drug therapies, surgical treatment of epilepsy, or mechanical device implantation such as a neurostimulator. Additionally, he worked closely with Dr. Laura Kalayjian at LAC-USC Medical Center to manage and treat epilepsy during pregnancy.

Working with fellow neurologist Dr. Andrew Ly, Dr. Muir is now serving as the Director of Neurophysiology Services at Hoag Hospital.

Lauren Bennett, Ph.D., ABPP-CN

Clinical Neuropsychologist

Dr. Bennett is a clinical neuropsychologist who completed her training at several top-tier institutions, including the Cleveland Clinic Lou Ruvo Center for Brain Health (two-year neuropsychology postdoctoral fellowship specializing in sports neuropsychology), University of Maryland/VA Maryland Healthcare System (residency), UCLA (externship), Children’s Hospital Los Angeles (externship), and California School of Professional Psychology at Alliant International University, Los Angeles (doctorate).

Her clinical interests include neurodegenerative diseases, traumatic brain injury, vascular disease/stroke, epilepsy, multiple sclerosis, and the relationship between psychological and cognitive symptoms. Dr. Bennett is the author of numerous publications centering on cognitive functioning in various neurodegenerative diseases and the long-term cognitive effects of repetitive head impacts in sports.

Suzanne Pach, M.S.N., FNP-C, S.C.R.N.

Nurse Practitioner, Neurology

Suzanne Pach, M.S.N., FNP-C, S.C.R.N., has been working at Hoag as a Nurse Practitioner in the Epilepsy Program with the Pickup Family Neurosciences Institute since October 2017. Prior to coming to Hoag, she worked as a nurse practitioner with the Comprehensive Stroke Program and the Orthopedic Spine and Joint Replacement Programs at the Medical University of South Carolina since 2011. She received her Masters of Nursing and Family Nurse Practitioner degree from the Medical University of South Carolina (MUSC) in 2009. She also completed a Master of Science in Health Professional Education from MUSC in 2000. She received her Bachelors of Science in Nursing from MUSC in 2006 in addition to a Bachelors of Science in Medical Technology degree in 1994. Her undergraduate work was at Erskine College, Due West, South Carolina in 1993 with a Bachelor of Science degree in Biology. Suzanne is very passionate about patient advocacy which allowed her to win the Daisy award for Nursing excellence at MUSC in 2009. She always strives to reach the best possible patient outcome and she is very happy to bring her high level of service to the Hoag family.

Nurse Navigator

Sheena Dhiman, R.N., B.S.N., M.B.A.

Neurosciences Nurse Navigator

To view all Pickup Family Neurosciences Institute Nurse Navigators​.

Sheena Dhiman, R.N., has been working as a nurse at Hoag since 2008. She worked in the Neuro Intensive Care Unit for seven years before taking over responsibilities as a Nurse Navigator with Pickup Family Neurosciences Institute. She received her Healthcare Executive MBA from University of California, Irvine in 2012 and her Bachelors of Science in Nursing from Mount St. Mary’s College in 2008. Sheena has extensive experience taking care of patients with various neurological and spine disorders, as well as in critical care.