School of Medicine
Showing 61-70 of 207 Results
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John V. Gahagan, MD, FACS, FASCRS
Clinical Associate Professor, Surgery - General Surgery
BioJohn Gahagan, MD is a Clinical Associate Professor of Surgery in the Section of Colorectal Surgery, and serves as Chief of Surgery at the Stanford Tri-Valley Hospital. He joined Stanford in 2019 to build the Stanford colorectal surgery practice in the East Bay at Stanford Tri-Valley in Pleasanton and at Stanford Health Care – Emeryville. He has training in advanced minimally invasive surgical techniques including robotic and laparoscopic surgery. He has authored several textbook chapters and original articles in peer-reviewed journals. His clinical practice is focused on the surgical treatment of colon and rectal cancers, inflammatory bowel disease (ulcerative colitis and Crohn’s disease), and benign colon and anorectal diseases (diverticulitis, hemorrhoids, fistulas, fissures). He believes in patient-centered care and multi-disciplinary approach to the treatment of diseases of the colon, rectum and anus.
Outside of his clinical practice, he is involved in surgical education and serves as an Associate Program Director of the Stanford General Surgery Residency Training Program as well as the Site Director for the Stanford Tri-Valley surgery rotation. He serves in various administrative roles, including as a member of the Stanford Tri-Valley Medical Staff Quality Committee and the Stanford Medicine Partners Quality and Credentialing Committee. -
Dyani Gaudilliere
Clinical Associate Professor, Surgery - Plastic & Reconstructive Surgery
BioDr. Dyani Gaudilliere specializes in Dental Surgery and Oral Oncology in a hospital setting. As a hospital dentist she performs surgical treatment of infection and trauma to the teeth and supporting alveolar bone. She also performs medically necessary dental clearance and extractions in the context of larger medical conditions, such as cardiac disease, joint replacement, or organ transplantation. As an oral oncologist, she specializes in surgical dental treatment prior to, during, and following radiation therapy and chemotherapy.
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Laura Graham
Other Teaching Staff-Hourly, Surgery
BioI am an epidemiologist and health services researcher with nearly 20 years of experience in surgical outcomes research. My work focuses on improving healthcare delivery and outcomes for Veterans and other vulnerable populations, particularly those who are older or medically complex. Using large administrative datasets from the Veterans Health Administration (VA), I study surgical processes and outcomes to inform system-level improvements.
With postdoctoral training in health economics and implementation science, I bring expertise in causal inference methodology and artificial intelligence, particularly the use of natural language processing (NLP). I apply these methods to extract insights from unstructured clinical data and to strengthen causal analyses in complex healthcare datasets. These approaches allow me to address research questions that were previously difficult to study with standard empirical approaches.
As a collaborative leader, I have mentored junior investigators and worked across academic and industry sectors to advance health services research. My goal is to translate evidence into practice, ultimately improving the quality of surgical care for Veterans. -
Teodor Grantcharov, MD, PhD, FACS, FRCS (Glasg)
Professor of Surgery (General Surgery)
On Leave from 03/09/2026 To 06/30/2026BioDr. Teodor Grantcharov is a board-certified, fellowship-trained surgeon specializing in bariatric (weight loss) and minimally invasive surgery. He is also a clinical professor of surgery at Stanford University School of Medicine and associate chief quality officer for innovation and safety at Stanford Health Care.
As a surgeon, Dr. Grantcharov specializes in minimally invasive and bariatric surgery. He is an accomplished researcher and leader in the field of surgical innovation and patient safety. His work has made important contributions in curriculum design, assessments of competence, and impact of surgical performance on clinical outcomes. Dr. Grantcharov developed the surgical Black Box concept, designed to transform safety culture in medicine and introduce modern safety management systems in high-risk operating rooms.
Dr. Grantcharov has published more 220 articles in peer-reviewed journals and given more than 200 invited presentations in Europe and North and South America. He holds several patents and is the founder of Surgical Safety Technologies, Inc.—an academic startup that commercializes the Black Box Platform™. Dr. Grantcharov has received several prestigious honors and awards, including the Queen Elizabeth II Diamond Jubilee Medal for his contributions in clinical research and patient safety in Canada.
Dr. Grantcharov is a fellow of the American College of Surgeons. -
Brooke Gurland, MD, FACS
Clinical Professor, Surgery - General Surgery
BioPelvic floor and functional bowel disorders refer to a series of symptoms and anatomic findings that effect men and women of all ages. These may include: constipation, difficult evacuation, fecal incontinence, irritable bowel disorders, diarrhea, pelvic organ prolapse, urinary and sexual dysfunction and pain. Although not life threatening, these disorders can severely affect quality of life and individual performance.
Over the past two decades I have dedicated my career to working with other specialists for comprehensive care for individuals with pelvic floor disorders. In July 2017, I joined The Department of Surgery, Division of Colorectal Surgery at Stanford University as the Medical Director of the Pelvic Health Center. I previously spent the prior decade at Cleveland Clinic running a multidisciplinary clinic and performing over 200 combined procedures in conjunction with colleagues in urology and urogynecology. We developed a robotic surgical approach to woman with vaginal and rectal prolapse and performed many surgeries to repair intestinal and rectal fistula (abnormal communications between the intestine and vagina).
Prior to that I established a Pelvic Floor Center at Maimonides Medical Center received a Jahnigan Career Development Award looking at multicompartment prolapse in elderly women. In addition to performing surgery and teaching throughout my career, I have maintained a commitment to long-term follow up of patients after surgery.
Although my training and focus is around surgical techniques and solutions for anorectal disorders and pelvic health, I believe that prevention, non-surgical alternatives, diet, exercise, and behavior management are vitally important to patient success.
One of my many goals is to educate patients, health care providers, and trainees about pelvic floor disorders.
When I am not at work I enjoy quality time with my three teenagers, dog, friends and I practice yoga. -
Geoffrey Gurtner
Johnson & Johnson Distinguished Professor of Surgery, Emeritus
Current Research and Scholarly InterestsGeoffrey Gurtner's Lab is interested in understanding the mecahnism of new blood vessel growth following injury and how pathways of tissue regeneration and fibrosis interact in wound healing.
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Beth Habelow
Lecturer, Surgery - Anatomy
BioPhysical therapist, lecturer
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S. Morad Hameed MD MPH
David L. Gregg, MD, Professor
Current Research and Scholarly InterestsTrauma Surgery
Emergency General Surgery
Critical Care
Public Health
