Surgery
Showing 1-18 of 18 Results
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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. Brian Ruhle is a board-certified surgeon with dual-fellowship training in minimally invasive bariatric (weight loss) surgery and endocrine surgery. He is also a clinical assistant professor in the Department of Surgery, Division of General Surgery at Stanford University School of Medicine.
Dr. Ruhle specializes in bariatric surgery, foregut (upper digestive tract) surgery, adrenal 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 therapies for managing obesity, improvements in screening and treating endocrine disorders, and optimizing outcomes in thyroid and parathyroid surgeries. He has published his findings in many peer-reviewed journals, including Surgery, Journal of Gastrointestinal Surgery, and Journal of the American College of Surgeons.
Dr. Ruhle has presented at prominent national conferences, including the annual meetings of the American Association of Endocrine Surgeons and the American College of Surgeons Clinical Congress. His presentations have discussed using GLP-1 receptor agonists (weight loss medications that help regulate blood sugar and reduce appetite) before and after bariatric surgery. He has also addressed improving screening protocols for hyperaldosteronism (high blood pressure caused by excess production of the hormone aldosterone by the adrenal gland).
Dr. Ruhle is a member of the American Association of Endocrine Surgeons, the American Society for Metabolic and Bariatric Surgery, and the 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.
