Clinical Staff


The Jacobs Institute has close partnerships with Kaleida Health, a private hospital system, and with the University at Buffalo. These partnerships allow for greater access to and collaboration with researchers and physicians specializing in vascular disease. They include neurosurgeons, cardiac surgeons, peripheral vascular surgeons, and cardiac electrophysiology surgeons.

L. Nelson “Nick” Hopkins
MD, FACS

L. Nelson “Nick” Hopkins


Founder & Chief Scientific Officer

Dr. L. Nelson Hopkins is founder and chief scientific officer of the Jacobs Institute. He was professor and chairman of the University at Buffalo (UB) Department of Neurosurgery and professor of radiology at the UB School of Medicine and Biomedical Sciences from 1989 to 2013. Dr. Hopkins was appointed SUNY Distinguished Professor, the highest rank of faculty in the SUNY system, in recognition of his extraordinary achievements, in January 2013. He is also founder of Kaleida Health’s Gates Vascular Institute (GVI).

He completed his undergraduate studies at Rutgers University and earned his medical degree cum laude from Albany Medical College. His post-graduate training included a surgical internship at Case Western Reserve, followed by neurology and neurosurgical training at UB.

Dr. Hopkins pioneered endovascular neurosurgery, a subspecialty dedicated to minimally invasive treatment of vascular diseases of the brain and spine and has trained a new generation of neurosurgeon leaders skilled in catheter-based technology for minimally invasive neurosurgery.

He has served as a member of the board of directors of the American Association of Neurological Surgeons (AANS) and of the Executive Committee of the Stroke Council of the American Heart Association. He has served as Scientific and Annual Meeting Chairman for both the AANS and Congress of Neurological Surgeons. He is the former chairman of the Joint Section on Cerebrovascular Surgery and president of the American Academy of Neurological Surgery.

Dr. Hopkins has been the principal investigator of several national clinical trials testing catheter-based technologies for the treatment of neurovascular diseases. He is the endovascular principal for the editorial board of Neurosurgery, and the author of more than 300 publications centered on the prevention and treatment of stroke.

Adnan H. Siddiqui
MD, PhD, FACS, FAHA, FAANS

Adnan H. Siddiqui


Chief Medical Officer

Dr. Adnan Siddiqui, MD, PhD, FACS, FAHA, FAANS serves as chief medical officer for the Jacobs Institute. He is a professor of neurosurgery at the University at Buffalo (UB). Dr. Siddiqui is also director of neurosurgical stroke service at Kaleida Health’s Gates Vascular Institute, director of Kaleida Health/UB neuroendovascular fellowship program, and director of UB Toshiba Stroke and Vascular Research Center. He completed fellowship training in interventional neuroradiology, cerebrovascular surgery, and neurocritical care from Thomas Jefferson University in Philadelphia. He completed his neurosurgical residency at Upstate Medical University and received his PhD in neuroscience from the University of Rochester and medical degree from Aga Khan University in Pakistan. Dr. Siddiqui is well-trained in all general neurosurgical procedures, including brain tumor, spine, and peripheral nerve surgery. Owed to specialized training, he has gravitated toward vascular diseases involving the brain and spinal cord, particularly aneurysms and arteriovenous malformations, among others. Dr. Siddiqui has special interest and expertise in the performance of complementary microsurgical, radiosurgical, and endovascular techniques for the comprehensive management of cerebrovascular conditions.

The Neuroendovascular Research and Stroke Service at Kaleida Health’s Gates Vascular Institute is led by Dr. Siddiqui. He also serves as a reviewer for Stroke, Neurosurgery, Journal of Neurosurgery, Journal of Neurointerventional Surgery, and many others. He has published in more than 200 peer-reviewed publications, more than 50 chapters, and has been invited to more than 200 national and international lectureships.

Dr. Siddiqui is currently Treasurer of the Joint Cerebrovascular Section of the American Association of Neurological Surgery (AANS). He has served on the Endovascular Task Force of AANS and served on multiple scientific committees  AANS, Society of Neurointerventional Surgery, and the Congress of Neurological Surgeons. He is also a member of the Society of Neurological Surgery’s committee for multidisciplinary advanced training and credentialing in neuroendovascular surgery.

Vijay S. Iyer
MD, PhD, FACC, FSCAI

Vijay S. Iyer

Dr. Iyer is an interventional cardiologist specializing in structural heart interventions. His clinical practice includes general cardiology, interventional cardiology and complex valvular heart diseases. He directs a complex valve clinic, as well as structural heart interventions at the Gates Vascular Institute (GVI) and Buffalo General Medical Center (BGMC). In that capacity, he performs transcatheter aortic valve replacements (TAVR), mitral clip procedures, left atrial appendage occlusion, atrial and ventricular septal defect closure, and percutaneous paravalvular leak closures. He also cares for patients by performing routine diagnostic coronary angiograms and percutaneous coronary interventions (PCI)/angioplasty.

His research interests are in new devices for aortic and mitral valve replacement, novel therapeutics in the form of stem cells and newer therapies for acute coronary syndromes. He also collaborates with the Toshiba Stroke and Vascular Research Center to develop advanced imaging modalities in the cardiac catheterization laboratory. Dr. Iyer is also investigating the use of robotic PCI to improve precision in stent placement and reduce radiation dosage in the catheterization laboratory, and he serves as the local principal investigator for a number of multicenter clinical trials in these areas.

Dr. Iyer received his medical degree in internal medicine from Grant Medical College, Maharashtra University of Health Sciences and his PhD in pharmacology from Drexel University in Philadelphia. Dr. Iyer was a postdoctoral fellow in the division of cardiology at University at Buffalo (UB). He also completed a fellowship in cardiovascular disease from UB and then a fellowship in interventional cardiology at University of Minnesota. Among his accolades are the American Heart Association Postdoctoral Fellowship, Young Investigator Award for New York State American College of Cardiology, and Northwestern University Young Investigators Forum Finalist. He is a current Fellow of the American College of Cardiology and the Society for Coronary Angiography and Interventions.

Elad I. Levy 
MD, MBA, FACS, FAHA

Elad I. Levy 

Dr. Elad Levy is professor and chairman of neurosurgery, and professor of radiology at University at Buffalo (UB). Dr. Levy joined the department in 2004. He is the medical director of neuroendovascular services at the Gates Vascular Institute (GVI) and is board-certified by the American Board of Neurological Surgeons. Dr. Levy is the director of stroke research, co-director of Kaleida Health Stroke Center and Cerebrovascular Surgery, director of endovascular stroke treatment and research, and director of endovascular stroke treatment and research.

He graduated from Dartmouth College and received his Doctor of Medicine degree with distinction from The George Washington University. He completed a surgical internship and his neurosurgical residency at the University of Pittsburgh and his fellowship at UB. He also received his MBA from Northeastern University in 2013.

Dr. Levy has participated in several clinical research studies on synthetic bone, carotid artery revascularization, and stents. Recently, he has become involved with a study investigating concussion injury as it relates to blood-flow physiology of the brain. Companies such as Boston Scientific, Cordis, Micrus, ev3, and Abbott Vascular have solicited Dr. Levy for research projects, consultant roles, symposium speaking engagements, and physician training requests. He has been published in numerous peer-reviewed journals and has presented at both national and international meetings. Additionally, he has trained several physicians throughout the world in using complex endovascular neurosurgical techniques. Dr. Levy is also the principal investigator for flow diverting technologies.

He is a member of the American Association of Neurological Surgeons(AANS) and Congress of Neurological Surgeons (CNS). He is an ex officio member of the Executive Council for the AANS/CNS Cerebrovascular Section. Dr. Levy was also a Fellow of both the American College of Surgeons and the American Heart Association/American Stroke Association. He was also chair of the Compliance and Ethics Committee for CNS.

Kenneth Snyder
MD, PhD

Kenneth Snyder

Dr. Snyder has been with University at Buffalo Neurosurgery (UBNS) since 2011, after completing his fellowship training in endovascular neurosurgery with UBNS and spening six months as a research fellow at the Barrow Neurological Institute with Dr. Robert Spetzler. He completed his neurosurgical residency at University at Buffalo (UB) and received his PhD in biophysics under the guidance of Dr. Frederick Sachs, specializing in mechanoelectric transduction of cellular membranes. He is trained in all general neurosurgical procedures.

His extra training in open cerebrovascular techniques, as well as his endovascular fellowship, give him the necessary toolset for specialization in the comprehensive management of neurovascular pathology in both the brain and spinal cord, including treatment of aneurysms, arteriovenous malformations, arteriovenous fistulas, and stroke. He has special interests and expertise in physiological imaging of the brain and its use in the evaluation and management of acute stroke patients, as well as all endovascular techniques for acute stroke intervention for both extracranial and intracranial vascular occlusive disease.

Dr. Snyder has been awarded a Congress of Neurological Surgeons Vascular Fellowship for Cerebrovascular Research, a Toshiba Stroke Imaging Research Fellowship, the Gold Humanism in Excellence in Teaching, and was named UB Neurosurgery Resident of the Year.

His active research interests include use of CT Perfusion (CTP) for acute stroke management, application of perfusion imaging to on-table angiography, glasses-free 3D imaging in both the operating room and endovascular suite, as well as basic science research on the role of mechanosensitive ion channels both in aneurysm formation and vasospasm. He has published numerous articles and holds multiple patents. He is an active member of several national neurosurgical and interventional organizations and has given multiple CME lectures nationwide on the role of CTP in endovascular stroke management.

Chee H. Kim
MD

Chee H. Kim

Dr. Kim is board-certified in cardiovascular disease and clinical cardiac electrophysiology. He is a member of Great Lakes Cardiology, a private practice. In addition to the practice, Dr. Kim is director of Electrophysiology Innovation and Clinical Integration for the Jacobs Institute and Kaleida Health’s Gates Vascular Institute.

He was previously the director of the Electrophysiology and Pacemaker Service at Rochester General Hospital in New York.

He earned his bachelor’s degree at Cornell University in Ithaca, N.Y., and his medical degree at Case Western Reserve University in Cleveland, O.H. Dr. Kim completed Internal Medicine specialty training at the University of Rochester School of Medicine. He also received cardiology and cardiac electrophysiology fellowships at the University of Rochester, where he was the chief cardiology fellow.

Dr. Kim is a member of the American Heart Association, and a fellow of the American College of Cardiology. He has authored or co-authored articles and abstracts on his research and clinical practice for numerous medical journals and publications. In addition, he has lectured and presented at national meetings and conferences.

Jason Davies
MD, PhD

Jason Davies


Research Director

Dr. Jason Davies is Research Director at the Jacobs Institute. He is also an Assistant Professor of Neurosurgery and Biomedical Informatics at the State University of New York (SUNY) at Buffalo, where he joined the department in 2016. He completed residency training in the Department of Neurological Surgery at University of California, San Francisco. He completed a fellowship in endovascular neurosurgery with UB Neurosurgery and specializes in cerebrovascular and skull base neurosurgery. He has extensive experience treating aneurysms, arteriovenous malformations, cavernous malformations, and arteriovenous fistulae, stroke, carotid stenosis, cerebral bypass, and other vascular disease using both open and endovascular approaches.

Dr. Davies graduated from Stanford University with a B.S. in Chemistry and a minor in Biological Sciences.  He has a significant research background in molecular and cell biology, studying neuronal exocytosis proteins. After graduation, he continued his work on exocytic proteins, shifting to a molecular and computational biophysics perspective. Jason was accepted into the MD/PhD program at Stanford, where he continued his thesis work. He wrote several papers elucidating the atomic structural details of exocytic proteins and developed new computational methods for studying dynamic protein structures at high resolution in real time. During the course of his residency, he spent a one-year post-doctoral fellowship developing computational methods in natural language processing and machine learning algorithms to find ways to mine electronic medical records data.

His active research interests focus on using bioinformatics tools to advance personalized medicine. He is working to develop bioinformatics tools to improve the quantity and quality of data available for medical research, and to lower barriers to entry for all clinicians to contribute to medical knowledge. Furthermore, he is working to create more advanced machine learning and data analytic methods to better understand the insights contained within these rich data resources to better understand nuances of disease as well as which patients stand to benefit.

He has co-founded and grown several early stage medical device and medical informatics companies.  He has experience developing intellectual property, conducting early phase clinical device trials, and raising capital.

Dr. Davies is married with three energetic boys.  He loves cycling and skiing with his family.

William M. Morris
MD

William M. Morris

Dr. Morris joined the Buffalo Medical Group, PC, in 2000, and is board-certified in internal medicine and cardiovascular disease. He has been a clinical assistant professor of medicine at the University at Buffalo (UB) School of Medicine and Biomedical Sciences since 1987.

Dr. Morris earned his medical degree at the University of Ottawa, in Ontario, Canada. He completed internal medicine specialty training at UB and Mercy Hospital, and also did residencies in cardiology at the University of Toronto, and Wellesley and Toronto General Hospitals.

He is a member of the American Medical Association, American College of Physicians, American College of Cardiology, American Heart Association, American Society of Internal Medicine, Western New York Cardiovascular Society, and the Erie and New York State Medical societies.

Dr. Morris is affiliated with many Western New York hospitals, including Buffalo General, the Gates Vascular Institute, Suburban, Mercy, Sisters of Charity, St. Joseph’s, Lake Shore, Lockport Memorial and Roswell Park Cancer Institute.

Sonya Noor
MD

Sonya Noor

Dr. Noor has considerable experience delivering highly skilled care in the area of endovascular surgery. She is fellowship-trained in peripheral and endovascular surgery and is board-certified in vascular and general surgery.

She attended the prestigious Calcutta Medical College in India, and subsequently completed research as a fellow in the Department of cardio-thoracic surgery at the Medical University of South Carolina. Dr. Noor started her general surgery residency at the State University at New York (SUNY) Syracuse. In 2004, she completed an endovascular fellowship at the Arizona Heart Institute in Phoenix, Arizona.

Dr. Noor is a member of the American Medical Association, Western New York Vascular Society, and Eastern Vascular Society. She is affiliated with several Western New York hospitals, including Buffalo General, the Gates Vascular Institute, Millard Fillmore Suburban Hospital, and Sisters of Charity.

Kishor Phadke
MD, FACC

Kishor Phadke

Dr. Phadke has a medical degree from the Mahatma Ghandi Memorial Medical College in Indore, India, and a Membership of the Royal College of Physicians postgraduate diploma from the Royal College of Physicians of London. Dr. Phadke practiced medicine in India and the U.K. before coming to the United States in 1993.

He served as attending cardiologist and director of the Cardiac Catheterization Laboratories at the VA Medical Center and the University Hospital in Syracuse, N.Y., where he was also a Clinical Associate Professor of Medicine until he came to Buffalo in 2002. Dr. Phadke is currently a cardiologist at Northtowns Cardiology and is director of the Cardiac Catheterization Laboratory at Kaleida Health’s Gates Vascular Institute.

Dr. Phadke is a Diplomate of the American Board of Internal Medicine in Cardiovascular Diseases and Interventional Cardiology. He is a Fellow in the American College of Cardiology and a member in the American Heart Association’s Council in Clinical Cardiology.

David M. Zlotnick
MD

David M. Zlotnick

Dr. Zlotnick is an Interventional Cardiologist with the UBMD Division of Cardiovascular Medicine. He earned his medical degree from SUNY Upstate Medical University in Syracuse, N.Y., and completed his internal medicine residency, cardiovascular disease and interventional cardiology fellowships at Dartmouth-Hitchcock Medical Center in Lebanon, N.H. He also completed an additional year of training at The Ochsner Clinic Foundation in New Orleans, L.A., focusing on structural heart and peripheral vascular interventions. He is board-certified in internal medicine, cardiovascular disease, and interventional cardiology, with additional certifications in echocardiography, nuclear cardiology, and non-invasive vascular interpretation.

His interventional practice includes the evaluation and management of patients with complex coronary and structural heart disease. His practice also has a specialized focus on the evaluation and management of patients with peripheral vascular disease including endovascular therapies. Patient-care responsibilities are provided at the Gates Vascular Institute and at Buffalo General Medical Center on the consultative service and Cardiac Care Unit (CCU). Outpatient cardiac care services are also provided through the UBMD ambulatory practice at Dent Tower. Dr. Zlotnick is a member of the American College of Cardiology and American Registry for Diagnostic Medical Sonography.

Dr. Zlotnick received his B.S. in biology from the University of Rochester and his medical degree from SUNY Upstate Medical University. He completed his residency in internal medicine at Dartmouth-Hitchcock Medical Center and served as chief resident. Dr. Zlotnick completed his fellowships in cardiovascular disease and interventional cardiology at Dartmouth-Hitchcock, as well. He completed his fellowship in interventional cardiology and peripheral vascular intervention at the Ochsner Clinic Foundation.

He received the Excellence in Teaching Award of the Department of Medicine (2008) and the Dean’s Letter of Commendation for Outstanding Academic Performance during the third year of medical school.

Maciej Dryski
MD, PhD

Maciej Dryski

Dr. Dryjski is professor of surgery and vice-chair for faculty development at the University at Buffalo (UB) as well as the medical director of vascular and endovascular surgery for Kaleida Health. Dr. Dryjski holds a PhD from the Karolinska Institute in Stockholm, Sweden, where he studied the uptake and inhibition of Thrombin on the vessel wall and synthetic arterial grafts. He received his MD from the Medical Academy of Warsaw in Poland.

He was the recipient of the Swedish Medical Research Council Award for Research in the United States, the Am-Pol Eagle Citizen of the Year for Health/Medicine, the International Society of Endovascular Specialists Milestone Award, and the Tytus Chalubinkski Medal for Outstanding Merit to Warsaw Medical School.

Prior to coming to the U.S., Dr. Dryjski completed his internship, residency, and fellowships in Sweden where he served as a clinical fellow in the Department of Radiology at Soderjukhuset. Dr. Dryjski then served as an intern at Nacka Hospital in Stockholm for two years. For five years, he was a resident in general surgery at the Karolinska Institute and Hospital in Stockholm.

In the U.S., Dr. Dryjski served his residency in general vascular surgery for two years in the Department of Surgery at the University of South Florida in Tampa, before serving as a resident in general surgery in the department of surgery at Thomas Jefferson University in Philadelphia. He then traveled to Durham, N.C., to serve as a research associate in the division of clinical pharmacology in the department of medicine and pharmacology at Duke University Medical Center.

Dr. Dryjski has been an active member of the Association of International Vascular Surgeons (AIVS), among many other societies, and was chosen to host the 2015 annual AIVS Symposium. Dr. Dryjski is most noted for endovascular aortic repair (EVAR).