Neurosurgery Clinical Instructors

Maleeha Ahmad, MD, FRCS SN
Stereotactic Radiosurgery and Neuro-oncology

Maleeha Ahmad, M.D F.R.C.S S.N., is a British Neurosurgeon who graduated with Distinction from the University of Southampton School of Medicine, U.K.

Dr Ahmad completed her Neurosurgical residency with the Yorkshire and Humber Deanery - obtaining the  Membership and then the Fellowship of the Royal College of Surgeons of the United Kingdom. After her Board Certification in Neurological Surgery, Dr Ahmad undertook her first Fellowship at Weill Cornell Medical Center’s Skull Base Research Lab focusing on endoscopic and transcranial routes to the sellar and perisellar regions.  

Dr Ahmad then joined Geisinger Medical Center as their first Neurosurgical Oncology Fellow and junior Faculty, with focus on gliomas and brain metastases. In addition to increasing surgical autonomy, Dr Ahmad also incorporated the adjuvant use of the clinical application of tumor treating fields, robotics, laser interstitial thermal therapy and stereotactic radiosurgery to her clinical practice. Dr Ahmad then joined the University of Pittsburgh Medical Center hospital network as full time faculty.

In July 2020, Dr Ahmad joined the Department of Neurosurgery at Stanford University. Dr Ahmad is working with Dr Steven D.Chang - Professor and Vice Chairman of Strategic Development and Innovation in the Department of Neurosurgery at Stanford, and Co-Director of the Surgical Neuro-Oncology and Stanford Cyberknife Radiosurgery Programs.  Dr Ahmad’s work will focus on brain and spinal tumors and vascular neoplasms using an armamentarium of on-going clinical research effectiveness and trials, up to date neurosurgical adjuvant, combinatorial approaches and Cyberknife stereotactic radiosurgery and neuro-oncology.

S. Uzair Ahmed, MD
Cerebrovascular Surgery

Dr. Ahmed grew up in Regina, Saskatchewan, Canada, attending the University of Regina for his undergraduate studies. He competed at the collegiate level as a track and field athlete, and was a Canada West medallist in hurdles, as well as achieving Academic All-Canadian honours. He obtained his medical degree at the University of Saskatchewan, where he continued on to complete residency training in neurosurgery.

During residency, Dr. Ahmed completed a clinical research fellowship at Mount Sinai Hospital, New York. His research interests are in cerebrovascular disease, and his current masters work focuses on advanced imaging in stroke.

Dr. Ahmed joins Stanford as a clinical instructor in Cerebrovascular and Skull Base neurosurgery, working with Dr. Gary Steinberg to gain experience in the treatment of complex cerebrovascular disorders.

Amit B. Ayer, MD, MBA
Functional Neurosurgery

Dr. Ayer completed his undergraduate education at Queen’s University with a degree in life sciences and an honors thesis in immunology. He then completed his medical training at Wake Forest University and his neurosurgical training at Northwestern University Feinberg School of Medicine, where during residency he also obtained a Master of Business Administration from Kellogg School of Management. 

As a clinical instructor at Stanford, Dr. Ayer will be focused on the surgical treatments of movement disorders, epilepsy and pain. Dr. Ayer has clinical interests in surgical treatment for epilepsy, movement disorders, skull base approaches, hydrocephalus and spine surgery. His research has focused on bioelectronic tools for the treatment of neurosurgical pathology and is interested in developing novel brain computer interfaces and biosensors for the restoration of sensorimotor function. 

In his free time, he enjoys playing guitar, hockey, hiking, and traveling.​

Scott Berta, MD, FAANS
GME Clinical Fellow in Neurosurgery/Cyberknife

  • Board Certified Neurosurgeon 
  • Fellow of the American Academy of Neurological Surgeons
  • Diplomat of the American Board o Neurological Surgery 

Dr. Berta completed Master's degrees from Princeton University and the University of Pennsylvania in Chemistry and Biomedical Engineering, respectively. He ultimately joined Stanford as an operative Spine Fellow and completed his neurosurgery residency at Stanford as well. Dr. Berta was Chief Editor of the textbook entitled "Neurosurgery Tricks of the Trade," where the publication won the Pros Award in 2015 for top medical publication by Thieme. 

Dr. Berta spent the next years going between private practice and academic neurosurgery positions. During his career, he served as Director of Neurotrauma as well as Neurosurgery Medical Director. Dr. Berta went to Sydney Australia for a 6-month sabbatical and has returned to the Stanford Neurosurgery Department to obtain specialty training in stereotactic radiosurgery (SRS) as the 2020-2021 Cyberknife Fellow.     

Vivek P. Buch, MD
Epilepsy, Functional, and MRgFUS

Dr. Buch completed his undergraduate and medical training with honors in the direct BA/MD program at Brown University. During medical school he was selected as a HHMI-NIH Research Scholar for which he spent one year living on the NIH campus studying graph theoretic network analysis and connectomics. He then completed his neurosurgical residency at the University of Pennsylvania. 

As a Clinical Instructor, Dr. Buch will be focused on the open and minimally invasive treatments for adult and pediatric epilepsy, movement disorders, and pain disorders. He will have a specialized focus helping lead some clinical trials for the emerging modality of MR guided Focused Ultrasound to treat epilepsy and targeted blood brain barrier disruption. On top of epilepsy his clinical interests are in eloquent region tumor resection, low grade gliomas, facial pain syndromes, and expanding the role of camera-based minimally invasive approaches for common cranial and spinal conditions. His research is pioneereing novel human-machine interface technology for learning and cognitive disorders as well as developing new patent pending camera-based technology for surgical guidance platforms. He is excited to expand on this work with the powerful Stanford Divisions of Neuroengineering and Computer Science. 

He is an avid soccer player and enjoys playing golf, most other sports, hiking, outdoor activities, music, and spending time with family and friends. 

Hubert Lee, MD, MSc
Cerebrovascular Surgery

Dr. Lee grew up in Toronto, Ontario, Canada and completed his undergraduate degree in neuroscience at the University of Toronto. He remained at the University of Toronto where he obtained his medical degree. Subsequently, he completed a neurosurgical residency at the University of Ottawa during which time he also obtained a Master of Epidemiology investigating predictors of delayed cerebral ischemia in aneurysmal subarachnoid hemorrhage. He later returned to Toronto for a 2-year fellowship in interventional neuroradiology at St. Michael’s Hospital and the Toronto Western Hospital. 

Dr. Lee comes to Stanford University as a clinical instructor to work with Dr. Gary Steinberg focused on gaining exposure to open surgical management of cerebrovascular diseases including intracranial aneurysms, vascular malformations, and ischemia. During his free time, Dr. Lee enjoys travelling with his wife, daughter, and son. He is an avid photographer and golfer.

Ahmed Mohyeldin, MD, PhD
Skull Base Surgery

Dr. Mohyeldin completed his undergraduate education at Emory University with a degree in neuroscience and behavioral biology.  Having been selected as an All-American Athlete, he was drafted to play professional soccer in Atlanta prior to medical school. Dr. Mohyeldin completed his medical education at George Washington University. During medical school he was awarded a grant from the American Association of Neurological Surgeons and from the Maryland Stem Cell Research Fund to pursue a post-doctoral research fellowship at Johns Hopkins University under the mentorship of Dr. Alfredo Quinones-Hinojosa. His research investigated developmental transcriptional programs coopted by brain cancer with a specific focus on chordomas and glioblastomas. During this time, he developed the first animal model for chordoma and identified the transcription factor brachyury as a novel therapeutic target, which is currently the focus of a major NIH clinical trial as well as multiple drug design studies for chordoma patients. Dr. Mohyeldin pursued his neurosurgical training at Ohio State University, during that time he was awarded the R25 grant from NIH to further pursue this work. After completing his residency, he remained at OSU and pursued a clinical fellowship with Dr. Daniel Prevedello and Ricardo Carrau in advanced skull base and endoscopic cranial surgery. He comes to the Neurosurgery Department to work with Dr. Juan Fernandez-Miranda and collaborate with leading basic scientists at Stanford to identify and target important transcriptional programs that maintain cancer stem cell populations in chordoma to find a meaningful cure for this disease.

Jay Nathan, MD
Spine Neurosurgery

Dr. Nathan completed undergraduate studies at the University of California, Berkeley, with a double-major in economics and neurobiology, with honors. Following medical school at Stanford, he completed neurosurgery residency training at the University of Michigan.

During residency, Dr. Nathan utilized big data to study spine surgery patient outcomes, including examining reductions in opioid use after various spine operations. He received a Charles Kuntz Scholar Award from the Joint Section on Disorders of the Spine and Peripheral Nerves for this work. Building off research on socioeconomic issues in neurosurgery, Dr. Nathan has pursued numerous opportunities to study and shape health policy. He served as a US Senate Health Policy Fellow in the office of Senator Bill Cassidy in 2018, researching and advising the Senator on issues ranging from Medicare reform, telemedicine, prescription drug pricing, and medical devices. Following completion of the competitive Council of State Neurosurgical Societies Socioeconomic Fellowship in 2019, he continues to serve as organized neurosurgery’s Washington Committee Fellow, advocating for federal health policy to improve care for neurosurgical patients. He also advises the American College of Surgeons’ Health Policy and Advocacy Group, serving a three-year term as its sole resident/associate representative.

Derek Yecies MD
Pediatric Neurosurgery

Dr. Yecies grew up in the Bay Area. He attended Princeton University for his undergraduate training where he majored in molecular biology and neuroscience. Prior to attending medical school at Boston University, Dr. Yecies worked in the Letai lab at the Dana-Farber Cancer Institute where his research focused on novel cancer therapeutics targeting the BCL-2 family of anti-apoptotic proteins. Dr. Yecies completed his neurosurgical training at Stanford University, during which time he also completed a postdoctoral fellowship in the Grant and de la Zerda labs.  His research interests include identifying novel therapeutic and diagnostic strategies for children with brain tumors and translating recent advances in optical coherence tomography and Raman spectroscopy into tools that can be used to detect brain tumor margins intraoperatively. Outside of the hospital he enjoys cooking, music, and spending time with his wife, sons, daughter, and extended family.