Stanford University
Showing 301-350 of 454 Results
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Laura Petrikovic, PA-C
Affiliate, Surgery - Vascular Surgery
BioLead advanced practice provider (APP) for the Vascular Surgery division of CVH at Stanford Palo Alto campus. Experienced advanced practice provider (APP) with broad medical knowledge, including prior roles in Neurosurgery and Cardiovascular Surgery. Moved to California from Pennsylvania and began working for Stanford Vascular Surgery in April 2021. Previous affiliation with UPMC in Pittsburgh, PA.
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Hang T Pham
Research Specialist, Surgery - General Surgery
Current Role at StanfordStanford School of Medicine: Senior Research Scientist
Stanford Prevention Policy Modeling Lab: Affiliated Member (https://ppml.stanford.edu/people/hang-pham) -
Eric Brian Pillado
Clinical Assistant Professor, Surgery - Vascular Surgery
BioDr. Pillado earned his bachelor’s degree at the University of Michigan before completing his medical degree at the University of California, Los Angeles. He then completed his vascular surgery residency at Northwestern University, where he also obtained a Master of Science in Health Services and Outcomes Research as well as a Master of Business Administration from the Kellogg School of Management during his professional development time.
His clinical research interests include improving vascular surgery healthcare delivery systems in underserved patient populations, multidisciplinary limb salvage, and advancing wellness initiatives within vascular surgery training. -
George A. Poultsides, MD, MS
Stanford Department of Surgery Professor
Current Research and Scholarly InterestsClinical trials of experimental diagnostics and therapeutics; outcomes analysis following combined modality treatment of hepatic, pancreatic, and gastrointestinal malignancies.
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Janey S.A. Pratt, MD
Clinical Professor, Surgery - Pediatric Surgery
BioDr. Janey S.A. Pratt, MD, FACS, FASMBS is a general surgeon who specializes in Laparoscopic and Robotic General and Metabolic and Bariatric Surgery (MBS). She began her career in general surgery at Massachusetts General Hospital, where she was a founding member of the MGH Weight Center. As surgical director she introduced minimally invasive MBS and adolescent MBS to MGH in 2001 and 2007 respectively. In 2011 Dr. Pratt took over as Director at the MGH Weight Center and continued to work on several national committees towards improving access and care for adolescents with severe obesity. Dr. Pratt continued to practice general surgery throughout her tenure at MGH seeing patients with breast cancer, hernias, and obesity. She performed advance minimally invasive surgery (MIS) as well as advanced endoscopy.
In 2016 Dr. Pratt moved to California where she began her work at Stanford University, splitting her time between the Lucille Packard Children’s Hospital and the Palo Alto VA. She performs Minimally Invasive MBS as well as endoscopy. Dr. Pratt has trained in robotic surgery as well. As a Clinical Professor of Surgery, Dr. Pratt is involved in training Stanford medical students and residents both in the OR, in clinic, in simulation labs and in the classroom. Since 2023 Dr. Pratt is dedicated only to the Children's Hospital running the Adolescent Metabolic and Bariatric Surgery program at LPCH. This is an MBSAQIP accredited program in a free-standing children's hospital dedicated to the multidisciplinary care of children with obesity. This program is one of the top 5 programs in the country. Dr. Pratt has been involved in creating and updated guidelines for Adolescent MBS since 2005. In 2018 she was first author on the ASMBS Pediatric Metabolic and Bariatric Surgery Guidelines. Her research interests include MIS MBS, pediatric obesity treatment and the use of medications to improve outcomes of MBS. Dr. Pratt frequently lectures on the subject of Adolescent Metabolic and Bariatric Surgery. -
Carla Pugh, MD, PhD
Thomas Krummel Professor
Current Research and Scholarly InterestsThe Technology Enabled Clinical Improvement (T.E.C.I.) Center is a multidisciplinary team of researchers dedicated to the design and implementation of advanced engineering technologies that facilitate data acquisition relating to clinical performance.
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Benjamin Micah Raber
Clinical Assistant Professor, Surgery - General Surgery
BioDr. Benjamin Raber is a board-certified, fellowship-trained surgical oncologist at Stanford Health Care. He is also a clinical assistant professor in the Department of Surgery, Division of General Surgery at Stanford University School of Medicine.
Dr. Raber specializes in surgical treatments for benign and cancerous breast diseases. He performs a wide range of procedures, including lumpectomy, nipple-sparing mastectomy, and preventive mastectomy. Dr. Raber uses the latest and most effective surgical approaches, including wire-free, breast-conserving surgery for lumpectomies and hidden scar surgery (to hide incisions). He is committed to compassionate, patient-centered care that involves close collaboration with his colleagues in medical and radiation oncology, radiology, and plastic surgery.
Dr. Raber is actively involved in community outreach and breast cancer education. He has led regional initiatives to promote awareness, expand access to breast cancer screenings, and improve early detection.
Dr. Raber’s research focuses on improving surgical treatments for breast cancer, including better ways to treat cancer that has spread to nearby lymph nodes. He has also explored using ultrasound imaging to help surgeons locate and remove cancerous tissue more precisely during breast-conserving surgery. His research has been published in prominent peer-reviewed journals, including Annals of Surgical Oncology, Magnetic Resonance Imaging Clinics of North America, and The American Journal of Surgery.
Dr. Raber is a fellow of the American College of Surgeons (ACS) and a member of the American Society of Breast Surgeons (ASBrS). -
Dan Riskin
Clinical Professor (Affiliated), Surgery - General Surgery
Staff, Surgery - General SurgeryBioDr. Riskin is a Clinical Professor of Surgery at Stanford University and a physician–entrepreneur focused on the application of artificial intelligence in healthcare. His work spans clinical practice, company building, and public policy, with a focus on using clinical data to improve care.
He has founded and led multiple healthcare technology companies applying artificial intelligence to clinical data, with products used by leading health systems, pharmaceutical companies, and insurers and influencing the care of millions of patients. He is the CEO of Verantos, a healthcare AI company focused on improving the reliability of real-world clinical data used in research and care.
Dr. Riskin has contributed to health policy in the United States and internationally, including Congressional testimony related to the 21st Century Cures Act and service on the U.S. Health Information Technology Advisory Committee (HITAC). His work has been featured in The Wall Street Journal and Forbes.
Dr. Riskin received his MD from Boston University, completed residency in surgery at UCLA, and fellowship training in critical care and acute care surgery at Stanford University. He is board-certified in surgery, critical care, palliative care, and clinical informatics. He also holds an MBA from the Massachusetts Institute of Technology and was a Stanford Biodesign Innovation Fellow. -
Gary K. Roberts, D.D.S.
Clinical Assistant Professor, Surgery - Plastic & Reconstructive Surgery
BioDr. Roberts has performed hospital dentistry and surgery at Stanford University Medical Center and Lucile Packard Children's Hospital since 1995. He is also on the faculty at University of the Pacific School of Dentistry. He treats a variety of oral and maxillofacial conditions, including dental trauma and infection, dental implant and restorative reconstruction, surgical tooth extraction, bone and tissue grafting, conventional and surgical endodontic procedures, dental oncology care of cancer patients, as well as orofacial pain treatment.
He has presented CME lectures and Grand Rounds to numerous Departments at Stanford, as well as teaching Residents and Fellows at Stanford Medical School and the Palo Alto VA. He also lectures in the Physician Assistant Program at Stanford.
During his nearly a quarter of a century of military service, he was one of the leading researchers on combat trauma and the pathophysiology of projectile wounds. He currently serves as a member of the Council on Peer with the California Dental Association and is an Anesthesia Evaluator for the California State Dental Board. Dr. Roberts is frequently asked to speak on a variety of topics to organizations both in the US and internationally. -
Perisa Ruhi-Williams, MD
Clinical Assistant Professor (Affiliated), Surgery - General Surgery
Staff, Surgery - General SurgeryBioDr. Perisa Ruhi-Williams is a board-certified General Surgeon practicing at the VA Palo Alto Health Care System. Her clinical practice is centered on utilizing robotic-assisted techniques for metabolic/bariatric surgery and hernia and abdominal wall reconstruction.
She graduated as an Echols Scholar with a Bachelor of Science in Biology from the University of Virginia. She earned her MD from the Virginia Tech Carilion School of Medicine and completed her General Surgery residency at the University of California, Irvine. While in residency, she served as the Chief Resident in Quality and Patient Safety at the VA Long Beach Medical Center. She subsequently completed an advanced fellowship in Minimally Invasive Surgery, Bariatrics, and Foregut Surgery at Stanford Health Care.
Dr. Ruhi-Williams is passionate about advancing surgical education and the wellness of surgical trainees. In addition to her clinical roles, she serves as the Site Director for the Surgery Core Clerkship at VA Palo Alto and Assistant Site Director for the General Surgery Residency Program at VA Palo Alto. -
Brian Ruhle, MD, MS
Clinical Assistant Professor, Surgery - General Surgery
BioDr. Ruhle is a board-certified surgeon with dual fellowship training in bariatric and minimally invasive surgery from Stanford Health Care and endocrine surgery from UCLA Health. He also serves as a clinical assistant professor in the Department of Surgery, Division of General Surgery at Stanford University School of Medicine.
Dr. Ruhle specializes in bariatric (weight loss) surgery, foregut (upper digestive tract) surgery, and abdominal wall reconstruction. He uses leading-edge laparoscopic and robotic surgical techniques to help patients achieve sustainable weight loss and improve obesity related health conditions. His expertise in advanced minimally invasive procedures offers patients significant benefits, including faster recoveries, reduced pain, and shorter hospital stays.
Dr. Ruhle’s research interests span a wide range of topics in metabolic and bariatric surgery. His studies have explored combination therapy for obesity management, improved screening and treatment of endocrine disorders, and optimizing outcomes in thyroid and parathyroid surgery. He has published his findings in numerous peer-reviewed journals, including Surgery, Journal of Gastrointestinal Surgery, Blood, and Journal of the American College of Surgeons.
During his surgical training, Dr. Ruhle presented at prominent national and regional meetings, including the annual meetings of the American Association of Endocrine Surgeons and American College of Surgeons Clinical Congress. His presentations have addressed innovative topics such as using GLP-1 agonists (medications that help regulate blood sugar and reduce appetite) before bariatric surgery. His presentations have also addressed improving screening protocols for hyperaldosteronism (high blood pressure caused by the excess production of the hormone aldosterone).
Dr. Ruhle is a member of the American Association of Endocrine Surgeons, American Society for Metabolic and Bariatric Surgery, Clinical Association of California Endocrinologists, and Society of American Gastrointestinal and Endoscopic Surgeons. -
Alejandra Ruiz
Postdoctoral Scholar, General Surgery
BioDr. Alejandra Ruiz is a physician-scientist working at the intersection of clinical medicine, health services research, and community-engaged intervention design. Based on her clinical experience in high-complexity settings, she works to optimize integrative care models that address both physical and mental health needs.
She is currently a postdoctoral researcher in the Departments of Emergency Medicine and General Surgery, where she examines structural barriers to care among underserved populations and develops pathways to improve access and care delivery. Her work is grounded in community-based participatory research, through which she designs, implements, and evaluates culturally responsive interventions. Dr. Ruiz is committed to advancing equitable, sustainable models of care that improve access, engagement, and patient outcomes. -
Charles William Ryan
Affiliate, Department Funds
Resident in SurgeryBioI was born and raised in Syracuse, New York. I first attended Onondaga Community College, where I developed a fascination with the development of complex biological systems, and then transferred to Syracuse University where I completed my B.S. in biochemistry. I next attended the University of Michigan MD/PhD program, where I used in-vitro models of human neurodevelopment to study to role of epigenetic marks in guiding neurogenesis. While at Michigan, I became interested in the prospect of harnessing in-vitro differentiation to cultivate functional tissues that can be transplanted to replace what is lost in degenerative conditions. Ophthalmology, with its microsurgical access to functionally critical cell layers, is well-positioned to capitalize on this emerging field of science to treat degenerative conditions. I am humbled and incredibly thankful to have the opportunity to pursue this aim as a SOAR resident at Stanford.
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Mattias Rydberg
Postdoctoral Scholar, Plastic and Reconstructive Surgery
BioMattias Rydberg, MD, PhD, is a hand surgeon and postdoctoral scholar in the Division of Plastic and Reconstructive Surgery at Stanford University School of Medicine. His research focuses on epidemiology, machine learning, and digital health technologies in hand surgery and musculoskeletal disease. Dr. Rydberg completed his medical and doctoral training at Lund University in Sweden, where his PhD work focused on diabetic hand disorders and large-scale register-based research.
At Stanford, he works in the laboratory of Dr. Paige Fox, studying peripheral nerve disorders, fibroproliferative diseases, and AI-based motion tracking technologies for upper extremity assessment. His current projects include national database studies on diabetes and entrapment neuropathies, frozen shoulder and Dupuytren’s disease, and the development of camera-based hand motion analysis tools using machine learning and computer vision. -
Yann Sakref
Postdoctoral Scholar, General Surgery
BioYann Sakref is a Postdoctoral Scholar in General Surgery at Stanford University, working within the Knowlton Lab. With a passion for interdisciplinary sciences and advancing medical biotechnology and patient care, Yann is developing clinical and AI solutions as part of an ARPA-H-funded project under Dr. Knowlton's supervision. His work focuses on creating computer vision models for surgical assistance and contributing to the collaborative development of innovative tools by working closely with clinical, engineering, and AI teams. He also works closely with collaborators at the S-SPIRE Center.
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Cintia Kimura
Affiliate, Department Funds
Resident in SurgeryBioGraduated from Medical School from Universidade de São Paulo (2013). Completed surgical training in General Surgery (2016) and Colorectal Surgery (2018) at Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Brazil.
Dr. Kimura obtained a PhD degree on anal cancer screening strategies at Universidade de São Paulo (2021) and an MPH degree with concentration in Epidemiology at Harvard T. H. Chan School of Public Health (2023).
Her current research focuses on how the gut microbiome can affect patients' risk of developing complications after colorectal surgery, and whether it can be modulated by short-term dietary interventions.
Her previous work focused on prevention and early treatment of anal and rectal cancer, and on the interaction between HPV infection and anal neoplasia. -
Nazish Sayed MD, PhD
Associate Professor (Research) of Surgery (Vascular Surgery)
Current Research and Scholarly InterestsThe Sayed Laboratory is focused on the development of novel technologies that drive innovation in regenerative medicine, disease modeling, and drug testing in vascular biology. The lab conducts translational research in vascular biology and aims to understand the role of the vasculature in the development of cardiac diseases, including those due to inherited genetic variants or environmental insults such as type 2 diabetes or hypertension. The lab employs the human induced pluripotent stem cell (iPSC) technology to generate patient-specific vascular cells (endothelial and vascular smooth muscle cells) as an alternative to animal models providing a human tissue surrogate for research that is scalable and sustainable. By employing this unique platform, the lab also investigates the role of chemotherapeutic agents (anti-cancer drugs) on the vasculature. Dr. Sayed’s lab has also established an endothelial regeneration program, where they leverage the innate immune system to regenerate endothelial cells from human fibroblasts.
Work from the lab has led to seminal discoveries in the areas of 1) Nitric oxide (NO) biology, (2) vascular biology, (3) stem cell biology, (4) cardiovascular disease modeling (5) cardio-oncology. -
Stephen Schendel
Professor of Surgery (Plastic and Reconstructive Surgery) at the Stanford University Medical Center, Emeritus
Current Research and Scholarly InterestsSurgical correction and the study of growth and development of craniomaxillofacial anomalies and deformities.
1. Histochemical Analysis of Facial Muscles.
2. Cranial Sutural Manipulation.
3. Stability of Mandibular and Maxillary Surgery.
4. Growth Factors in Infant Cranial Sutures.
5. Virtual Surgery.
6. 3-D Biocomputation4. Osteodistraction -
Carolyn Dacey Seib, MD, MAS
Associate Professor of Surgery (General Surgery)
BioDr. Carolyn Dacey Seib is a fellowship-trained endocrine surgeon and board-certified general surgeon who specializes in surgery of the thyroid, parathyroid, and adrenal glands. In 2025, she was among the first surgeons in the United States to earn a Focused Practice Designation in Complex Thyroid and Parathyroid Surgery from the American Board of Surgery, reflecting her expertise in these procedures and related patient management.
Dr. Seib provides comprehensive and personalized care for patients with thyroid, parathyroid, and adrenal disorders, including thyroid cancer, hyperthyroidism, primary hyperparathyroidism, primary aldosteronism, autonomous cortisol secretion, and pheochromocytomas. Her approach combines advanced surgical techniques with a focus on patient-centered outcomes, ensuring that each treatment plan is tailored to the individual.
In addition to her clinical practice, Dr. Seib is an NIH-funded researcher whose work focuses on optimizing surgical decision-making and outcomes for patients with endocrine disorders. She has received research support from the National Institute on Aging and the American Thyroid Association, and her studies have been published in leading peer-reviewed journals and featured in national media, including The New York Times.
Dr. Seib completed her undergraduate education at Princeton University (summa cum laude), earned her medical degree from the New York University School of Medicine, and completed her general surgery residency and endocrine surgery fellowship at the University of California, San Francisco (UCSF). -
Heather Selby, PhD
Basic Life Research Scientist, Stanford-Surgery Policy Improvement Research and Education Center
BioI am interested in developing medical imaging-based AI models to identify patients with locally advanced rectal cancer who achieve a clinical complete response to neoadjuvant chemoradiotherapy, with the goal of sparing them from surgery and its associated risks.
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Subhro K. Sen, MD
Clinical Associate Professor, Surgery - Plastic & Reconstructive Surgery
BioSubhro K. Sen, MD, Clinical Associate Professor in the Division of Plastic and Reconstructive Surgery, graduated from Northwestern University with a degree in biomedical engineering. He went on to receive his medical degree from the Northwestern University Feinberg School of Medicine. After medical school, he completed a yearlong peripheral nerve research fellowship under Dr. Susan Mackinnon at the Washington University School of Medicine in St. Louis. He completed his postgraduate training in general surgery at Indiana University, followed by plastic and reconstructive surgery at Johns Hopkins University. He finished his training with a hand and upper extremity surgery fellowship at Stanford University.
Dr. Sen’s general clinical interests are in reconstructive surgery, microvascular surgery, and hand and upper extremity surgery. His practice includes: post-traumatic extremity reconstruction; post-oncologic reconstruction of the head and neck, trunk and extremities; perforator flap surgery; and melanoma surgery. He is medical director of the Advanced Wound Care Center at Stanford Health Care. As a hand surgeon in the Robert A. Chase Hand and Upper Limb Center, he has interests in hand trauma, degenerative conditions, peripheral nerve injuries, and complex upper extremity flap reconstruction.
In addition to his clinical practice, Dr. Sen is involved in research, publication, and teaching. His peer-reviewed research includes studies on extremity reconstruction, peripheral nerve regeneration, and he has authored a number of book chapters on a variety of plastic and hand surgery topics. He has a strong interest in medical device innovation and is currently a faculty fellow in the Stanford Byers Center for Biodesign.
Dr. Sen is certified by the American Board of Plastic Surgery and the American Board of Surgery. He is a member of the American Society of Plastic Surgeons, the American Society for Surgery of the Hand, and the American Society of Reconstructive Microsurgery.
