School of Medicine
Showing 101-172 of 172 Results
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Anson Lowe
Associate Professor of Medicine (Gastroenterology and Hepatology), Emeritus
Current Research and Scholarly InterestsThe laboratory is focused on the relationship between injury, wound healing, and cancer. Esophageal, gastric, and pancreatic cancers are a focus. We are particularly interested in the regulation of cell signaling by EGFR, the EGF receptor. In addition to cancer pathogenesis, active projects include the development of new diagnostic assays and drugs.
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Linda Nguyen
Clinical Professor, Medicine - Gastroenterology & Hepatology
Current Research and Scholarly InterestsMy research interests focus on disorder of gastrointestinal motility. Specifically, those related to nausea and vomiting with or without gastroparesis, irritable bowel syndrome and chronic abdominal pain. My research focuses on understanding the cause of symptoms and development of new treatments targeting either symptom control and disease modification.
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Mindie H. Nguyen, MD, MAS, AGAF, FAASLD
Professor of Medicine (Gastroenterology and Hepatology) and, by courtesy, of Epidemiology and Population Health
Current Research and Scholarly InterestsWe conduct clinical trials and epidemiological, translational, and real-world studies of liver cancer, fatty liver (NASH, NAFLD), viral hepatitis B and C, liver cirrhosis, and liver transplant. We focus on risk identification for disease prevention and treatment for improvement of survival. We focus on sex, racial/ethnic, and socioeconomic disparities. We specialize in clinical trials, large international real-world consortium registry data, and large public/semi-public databases.
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Jennifer Yi-Jiun Pan
Clinical Assistant Professor (Affiliated), Medicine - Med/Gastroenterology and Hepatology
Staff, Medicine - Med/Gastroenterology and HepatologyBioMy research interests thus far have focused on immunology, GI cancers, and improving quality of care for patients. I am passionate about understanding the different genetic and lifestyle factors that are involved in GI cancers and other colonic pathology, as well as improving systems of care to better manage the health and improve the outcomes of patients with these diseases. Towards that end, I have been involved in research in Lynch syndrome in order to bridge the gap between our current understanding of cancer risk in this high-risk population and the creation and implementation of guidelines worldwide. I also had the opportunity to work with collaborators in the International Mismatch Repair Consortium at the Department of Colorectal Medicine and Genetics with the Royal Melbourne Hospital in Australia where I saw firsthand the global efforts in the fight against colorectal cancer. In my current role as a staff gastroenterologist at the VA Palo Alto, I oversee the colorectal cancer prevention program. My goal is to continue to be part of and contribute to collaborative clinical and research efforts in order to provide the best care for our patients.
Professional Education:
- Fellowship: Stanford University--Gastroenterology (2016)
- MS: Stanford University--Epidemiology and Clinical Research (2016)
- Residency: Yale-New Haven Hospital--Internal Medicine (2013)
- MD: University of Texas Southwestern Medical Center (2010)
- AB: Harvard College--Biochemical Sciences (2006)
Honors and Awards:
- American College of Gastroenterology North American International GI Training Grant (2016)
Professional Memberships:
- American Gastroenterological Association
-- Delegate, AGA Trainee and Early Career GI Committee (2016-2018)
-- Regional Planner, AGA Regional Practice Skills Workshop – California (2016-2017)
- Northern California Society for Clinical Gastroenterology2014 – Present
-- Education and Trainee Committee (2021-Present)
-- Communications Committee (2021-Present)
Selected NCBI Bibliography: https://www.ncbi.nlm.nih.gov/myncbi/jennifer.pan.1/bibliography/public/ -
KT Park MD MS
Adjunct Professor, Medicine - Med/Gastroenterology and Hepatology
BioPrior to joining Genentech in 2018, Dr. Park was Associate Professor at Stanford University School of Medicine, Co-Director of the IBD Center at Stanford Children’s Health, and an expert in Crohn’s disease and ulcerative colitis. Currently, he is the Global Head of Gastroenterology, Hepatology & Metabolism in Product Development at Genentech and Roche. Trained as a health economist, during his tenure in academia, Dr Park held research grants and funding support focused on the cost-effectiveness of biologic treatment strategies and novel non-invasive biomarkers for children and adults with IBD. He led national research registries at the Crohn’s & Colitis Foundation and scientific/clinical committees in numerous GI societies and physicians’ organizations. He received his BA in chemistry/biochemistry at Duke University, MD at University of Tennessee, and MSc in Health Economics/Policy at Stanford where he completed his clinical and postdoctoral trainings. He is Adjunct Professor of Medicine in the Division of Gastroenterology & Hepatology at Stanford University. At Genentech Roche, Dr. Park directs a team of clinical scientists and medical directors overseeing clinical phase drug development in gastroenterology, hepatology, and metabolism.
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Walter Park
Professor of Medicine (Gastroenterology and Hepatology)
Current Research and Scholarly InterestsDr. Park's research interests are in the diagnosis and management of pancreatic cysts, acute and chronic pancreatitis. His approach incorporates methods in health services research including the use of observational datasets, cost-effectiveness studies, and the development of clinical cohorts.
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Gopanandan Parthasarathy
Clinical Instructor, Medicine - Gastroenterology & Hepatology
BioDr Nandan Parthasarathy is a hepatologist and physician-scientist in the Department of Gastroenterology and Hepatology at Stanford University.
After obtaining his medical degree in JIPMER, India, he completed a 2 year clinical research fellowship at Mayo Clinic, following which he completed his residency training at Cleveland Clinic, and GI and transplant hepatology fellowships at Mayo Clinic. During his fellowship, his research work was focused on exploring the immune mechanisms of liver injury in metabolic dysfunction associated steatohepatitis.
Clinically, he is focused on taking care of patients with MASH, cirrhosis and liver cancer.
His career goal is to study the gut-immune system-liver injury axis in order to bring novel therapeutics from the bench to bedside in patients with liver disease. -
Edward A. Pham
Instructor, Medicine - Gastroenterology & Hepatology
BioMy interest in medicine and research was triggered by my mother’s battle with chronic hepatitis C, which made me realize the transformational power of biomedical research in treating patients. Therefore, my career goal is to become a physician scientist in the field of gastroenterology and hepatology dedicated to translating discoveries in the laboratory into novel medical treatment modalities. My research focus is alterations in phosphoinositides signaling and its pathogenesis in cancers of the hepatobiliary and luminal GI tract with the goal to identify novel targets for therapeutic intervention. I also have a particular interest in understanding the interface between chronic viral infection and cancer through studying how the innate and adaptive immune system are perturbed in chronic viral infections
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Peter Poullos
Clinical Professor, Radiology
Clinical Professor, Medicine - Gastroenterology & HepatologyBioDr. Poullos is a native of Stockton California. He earned his B.S. at Santa Clara University and M.D. degree at the University of Texas Medical School at Houston, after which he did an Internal Medicine residency at the University of California-San Francisco, finishing in 2002. He stayed at UCSF as a Gastroenterology fellow until 2004. However, after a spinal cord injury, he decided to retrain in Radiology. He did his Radiology residency at Stanford University, where he also completed a fellowship In Body Imaging in 2009. Dr. Poullos is now faculty in both the departments of Radiology and Gastroenterology and Hepatology. His clinical practice is at the Stanford Medicine, where he specializes in CT, MRI, and ultrasound of the abdomen and pelvis. His interests include radiology of the acute abdomen, hepatobiliary imaging, and colorectal cancer screening.
Dr. Poullos is the Founder and Co-Chair of the Stanford Medicine Alliance for Disability Inclusion and Equity (SMADIE), a group composed of people with disabilities and their allies at Stanford Medicine. In that role, Dr. Poullos advocates for students and healthcare providers with disabilities and for health equity for disabled patients. He is a Faculty Advisor to the Stanford Medical Students with Disability and Chronic Illness (MSDCI) and the MSDCI National organizations. Dr. Poullos and SMADIE have made significant contributions to the disability community, including starting the Stanford Conference on Disability in Healthcare and Medicine, drawing over 1000 participants from 39 countries. He is the Co-Host of the popular “DocsWithDisabilities” podcast, has spoken internationally about disability access in medicine, and has written and researched in the field. One of his proudest achievements is co-creating the Disability in Medicine Mutual Mentorship Program, serving the needs of disabled medicine and healthcare students and practitioners. In 2022, Dr. Poullos received the Stanford President’s Award for Excellence through Diversity. -
Susan Y. Quan
Clinical Assistant Professor (Affiliated), Medicine - Med/Gastroenterology and Hepatology
Staff, Medicine - Med/Gastroenterology and HepatologyBioClinical Focus:
Gastroenterology
Gastrointestinal Endoscopy
Board Certification:
Gastroenterology
Internal Medicine
Professional Education:
Fellowship: Stanford University School of Medicine, Gastroenterology and Hepatology (2014)
Residency: Johns Hopkins University School of Medicine, Internal Medicine (2011)
Medical Education: Johns Hopkins University School of Medicine (2008)
Undergraduate: Stanford University (2003) -
Stephan Rogalla, M.D. Ph.D.
Clinical Assistant Professor, Medicine - Gastroenterology & Hepatology
Current Research and Scholarly InterestsThe research interest of myself and my lab are in the field of early cancer detection using targeted molecular spies to highlight (pre)cancerous lesions. We as well aim to improve precision medicine in autoimmune disorders like inflammatory bowel disease and oncology.
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Arghavan Salles
Clinical Associate Professor, Medicine - Gastroenterology & Hepatology
BioDr. Salles is a minimally invasive and bariatric surgeon. She completed medical school and residency in general surgery at Stanford prior to completing her fellowship in minimally invasive surgery at Washington University in St. Louis. She stayed on faculty at Washington University for three years prior to moving back to Stanford in 2019.During the pandemic, Dr. Salles has served as a disaster relief physician, caring for patients with COVID in the ICU. Dr. Salles obtained a PhD in education from Stanford University during her residency training, and her research focuses on gender equity, implicit bias, diversity, inclusion, and physician well-being. Her R01 grant from the NIH focuses on sexual harassment. She is a sought-after speaker and has given over 100 national and international invited talks related to gender equity, physician well-being, and weight bias. She currently serves as the Special Advisor for DEI Programs at the Stanford University Department of Medicine where she is a Clinical Associate Professor.
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Edward Sheen
Adjunct Professor, Medicine - Med/Gastroenterology and Hepatology
BioDr. Edward Sheen is Chief Quality and Population Health Executive at L.A. Care. Serving more than 2.9 million members, L.A. Care is the largest publicly operated health plan in the country. As a public entity, its mission is to provide access to quality care for vulnerable and low-income communities and to elevate the safety net. Previously, he was Chief Population Health Officer, Senior Vice President at Health Catalyst and Chief Medical Officer, Market Development and Solution Design at Lumeris, a leading value-based care technology and services operator as well as 4.5-5.0 Star Medicare Advantage plan. He has worked with health systems and payers across the country to improve health outcomes, enhance patient experience, strengthen care provider engagement, reduce costs of care, and accelerate their journey towards accountable care. He is dedicated to achieving accessible, equitable, person-centered, and high-performing care for all.
Dr. Sheen’s experience has bridged the public, private, non-profit, and academic sectors and additionally includes work with Stanford University, the White House, U.S. Department of Defense, U.S. Department of Health and Human Services, California State Assembly, Kaiser Family Foundation, Blue Shield, California and American Medical Associations, Genzyme, and early-stage companies. In 2014, he was one of 15 Americans appointed by President Obama a nonpartisan White House Fellow. He subsequently served as a Special Assistant to the Secretary of Defense and Defense Department senior health policy advisor and was a recipient of the Office of the Secretary of Defense Medal for Exceptional Public Service. Dr. Sheen was a Term Member of the Council on Foreign Relations. He currently serves on the National Advisory Council on the National Health Service Corps, which advises the Secretary of Health and Human Services and the California Department of Public Health Office of Health Equity Advisory Committee. He is Adjunct Professor of Medicine and Global Health Faculty Fellow at Stanford. He has a long-standing active commitment to mentoring, teaching, and medical education.
Dr. Sheen completed his Internal Medicine and Gastroenterology training at Stanford, received his MD from the University of California, San Francisco, and earned his MBA and MPH through scholarships at Stanford Graduate School of Business and Harvard School of Public Health, where he was also a Harvard Kennedy School Center for Public Leadership Zuckerman Fellow. He graduated magna cum laude from Brown University (B.A. Public Policy) with induction into Phi Beta Kappa. -
Pradeep Kumar Siddappa, MD
Clinical Assistant Professor, Medicine - Gastroenterology & Hepatology
BioDr. Pradeep Kumar Siddappa is a board-certified, fellowship-trained gastroenterologist with Stanford Health Care. He is also a clinical assistant professor in the Department of Medicine, Division of Gastroenterology & Hepatology at Stanford University School of Medicine.
Dr. Siddappa specializes in advanced endoscopy procedures to diagnose and treat gastrointestinal conditions. He focuses on pancreatic care, including acute and chronic pancreatitis, pancreatic cysts, and pancreatic cancer. He uses advanced, minimally invasive methods to help detect pancreatic cancer early and treat people who cannot undergo surgery.
Dr. Siddappa has studied many gastrointestinal conditions over the years, garnering grant funding and several awards. His primary research examines pancreatic cancer and how to catch it earlier through biomarkers in the pancreatic cyst fluid. He also investigates ways to improve endoscopic and duodenoscopic technology. He has developed new endoscopic techniques for diagnosis and treatment, including endoscopic ultrasound-guided omental fine needle aspiration.
Dr. Siddappa has published his findings in peer-reviewed journals including the Journal of Gastrointestinal Cancer, Clinical Endoscopy, JGH Open, and the World Journal of Gastrointestinal Endoscopy. He has also shared his research and presented it at conferences around the world, including at the annual Digestive Diseases Week. He has covered topics including new diagnostic markers in pancreatic cyst fluid, narrow band imaging, hepatocellular carcinoma, and pancreatic ductal adenocarcinoma.
Dr. Siddappa is a member of the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy. -
Gulshan Singh
Postdoctoral Scholar, Gastroenterology
Current Research and Scholarly InterestsMy current research interest is to understand the host-microbial pathways in intestinal inflammation. I am working to explore cellular heterogeneity at single immune cell level in systemic and local regions of the intestine that are associated with different Inflammatory bowel disease conditions.
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Sundeep Singh
Clinical Associate Professor, Medicine - Gastroenterology & Hepatology
BioAfter living and training throughout the country, I am excited to be part of the Stanford team. As a result of both my personal experiences and training, I am passionate about ensuring that patients receive appropriate diagnostic testing and treatment options in order to improve people's quality of life. In collaboration with my amazing colleagues, I am confident in the high quality and easily accessible care we are able to provide to patients across northern California.
While my interest is most in inflammatory bowel disease, I am also interested in the interaction between mental health, incentives, and emerging therapies in gastroenterology. -
Sidhartha Sinha
Assistant Professor of Medicine (Gastroenterology and Hepatology)
Current Research and Scholarly InterestsThere are two primary and overlapping emphases of my research, both of which are driven and united by needs-based innovation and translational potential:
(1) Understanding the microenvironment of the inflamed versus normal gut in order to identify better therapeutic targets for people with immune-¬mediated GI disorders. Here, our investigations include understanding the influence and interactions of pharmacologic and dietary interventions on gut microbiome/metabolomic changes and the host immune response. In the context of providing patients with new understanding and solutions for their disease, I have led and advised on the design of both pilot and large clinical trials (including new FDA approved therapies) for anti-inflammatory therapies;
(2) Applying novel approaches and technologies (including natural language processing, computer vision, and reinforcement learning) to identify and address unmet clinical needs. In this area we have ongoing and published efforts in my lab to validate and develop solutions to pressing clinical needs. We have developed/led new drug delivery technologies with a multidisciplinary team that have shown strong potential in ongoing human IBD clinical trials. My lab has utilized both supervised and unsupervised approaches to analyze social media discourse and unstructured data sets for identifying patient needs that are rarely addressed in clinical settings. We have gained insights into patient perceptions around preventative health interventions, such as health screening and diet, including the dearth of evidence-based dietary recommendations to treat IBD (despite strong patient desire for solutions in this domain). -
Irene Sonu
Clinical Associate Professor, Medicine - Gastroenterology & Hepatology
BioI am passionate about gut health and strive to provide the best care to my patients. I specialize in complex motility disorders of the gastrointestinal tract. My areas of clinical expertise include achalasia, dysphagia, eosinophilic esophagitis, gastroesophageal reflux disease, gastroparesis, functional dyspepsia, irritable bowel syndrome, and pelvic floor dysfunction. I also see patients in need of fecal microbiota transplant for recurrent C. difficile infection.
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Sean Paul Spencer, MD,PhD
Assistant Professor of Medicine (Gastroenterology and Hepatology)
BioSean Spencer, MD,PhD is a Gastroenterologist and Physician Scientist at Stanford University working with Justin Sonennburg,PhD to uncover the role of dietary intake on the gut microbiome and mucosal immune system. Sean obtained his medical degree University of Pennsylvania, earning his PhD studying nutritional immunology with Yasmine Belkaid,PhD at the National Institutes of Health (NIH), after which he moved to Boston for residency training at Massachusetts General Hospital and completed his Gastroenterology training at Stanford University. Sean’s career goal is to study mechanisms by which dietary intake influences our microbiome and immune system to better understand and treat gastrointestinal disease. Sean has launched a microbiome-focused clinical practice at Stanford where he is working to develop novel microbiome diagnostics and microbial medicines.
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Ankit Srivastava
Temporary Employee, Medicine - Med/Gastroenterology and Hepatology
Current Role at StanfordAs a research scientist, the overarching goal of my research is to elucidate targetable cellular crosstalk between hepatocytes and immune cells in the liver that promotes aging, inflammation, and cancer. To highlight this, I use spatial biology, patient-derived organoids, and disease models of cancer and inflammation.
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Sarah Streett
Clinical Professor, Medicine - Gastroenterology & Hepatology
BioDr. Sarah Streett is a Clinical Professor of Medicine, the Director of Inflammatory Bowel Disease Education at Stanford, and she is passionate about taking care of people with IBD. She is a national expert in treating complex IBD and initiated a multi-disciplinary approach to care with colorectal surgery, pediatrics, and nutrition. In 2018 she received the Champion of Hope Award from the Crohn’s and Colitis Foundation and serves on their National Scientific Advisory Committee. Her interests focus on fertility and pregnancy in people with IBD, developing precision approaches to IBD therapy, and the role that the microbiome and diet play in its pathogenesis. She is a primary investigator of the Stanford IBD Registry and has research projects focused on optimizing clinical outcomes in IBD, the role of the microbiota and diet in IBD and pregnancy, and applying new technologies to individualizing therapy for IBD. She is also the primary investigator on multiple industry-sponsored IBD trials.
Teaching is a top priority for Dr. Streett who feels that mentoring fellows in the development of their careers is a privilege. She has held many national leadership roles in the American Gastroenterological Association, where she has been Chair of the Practice Management and Economics Committee, and currently serves on the Government Affairs Committee. She also an appointed member of the Gastrointestinal Drug Advisory Committee at the FDA. She has represented the interests of gastroenterologists and their patients on Capitol Hill numerous times. Dr. Streett believes strongly in a collaborative approach to give patients personalized care based on the latest therapies for the treatment of IBD and is committed to mentoring the next generation of experts in the field. -
Natalie Torok
Professor of Medicine (Gastroenterology and Hepatology)
Current Research and Scholarly InterestsOur lab is focused on exploring the role of matrix remodeling in disease progression in metabolic dysfunction steatohepatitis (MASH)-related hepatocellular carcinoma and primary sclerosing cholangitis. Our goal is to uncover how biomechanical characteristics of the ECM affect mechano-sensation, and how these pathways could ultimately be targeted. We are also interested in aging and its effects on metabolic pathways in MASH and HCC.
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Erin Watson, PsyD, ABPP
Clinical Associate Professor, Medicine - Gastroenterology & Hepatology
BioDr. Erin Watson is a board-certified clinical health psychologist and Clinical Associate Professor in the Division of Gastroenterology & Hepatology at Stanford University School of Medicine. She is a member of Stanford Health Care’s GI Behavioral Medicine program, where she specializes in the intersection of psychological health, behavioral science, and gastrointestinal and liver disease.
Dr. Watson’s clinical work focuses on helping patients navigate the emotional, behavioral, and lifestyle factors that influence medical illness. Her areas of expertise include health anxiety, stress and symptom management, health-behavior change, adjustment to chronic conditions, and the emerging specialty of psycho-hepatology. She integrates practical, evidence-based approaches—including cognitive behavioral therapy, acceptance and commitment therapy, mindfulness-based interventions, and motivational interviewing—with lifestyle-medicine strategies to support long-term health and resilience. Her goal is to help patients feel more informed, supported, and empowered throughout their care.
In addition to her clinical work, Dr. Watson is engaged in research to advance behavioral treatments for chronic pain and develop new psychological interventions for individuals living with chronic liver disease. She is a co-investigator on a National Institutes of Health–funded study examining effective treatment options for veterans with chronic pain and addiction. Her scholarly work has been published in peer-reviewed journals and presented at regional and national conferences, including annual meetings of the American Psychological Association.
Dr. Watson is a Fellow of the American Academy of Clinical Health Psychology and a member of the American Psychological Association, the Society for Health Psychology (Division 38), the Society of Behavioral Medicine, the American Association for the Study of Liver Diseases, and the Rome Foundation. -
Mike Tzuhen Wei
Clinical Assistant Professor, Medicine - Gastroenterology & Hepatology
BioDr. Wei was born and raised in Taipei, Taiwan. He went to Stanford for his undergraduate studies in Biology and earned his medical degree at Weill Cornell Medical College. Unable to stay far from the Bay Area, he returned to Stanford where he completed his residency in internal medicine and subsequently his fellowship in gastroenterology. Dr. Wei has specific interests in colorectal cancer and Barrett’s esophagus surveillance as well as reflux diagnosis and management. He has an interest in endoscopic resection of large polyps and had received training under Dr. Shai Friedland, a world expert in this field. Dr. Wei work focuses on evaluating new tools, technologies and techniques in gastrointestinal cancer surveillance and management. He has been involved in running several trials in endoscopic management of polyps and evaluating artificial intelligence applications in gastroenterology. His work has been published in American Journal of Gastroenterology, Gastrointestinal Endoscopy, Clinical Endoscopy, VideoGIE, and Digestive Diseases and Sciences. He was formerly an Associate Editor for the ACG Case Report Journal (2020-2022) and was on the Board of the Northern California Society of Clinical Gastroenterology. When not in clinic or in endoscopy, Dr. Wei enjoys spending time with his family. He and his family enjoy traveling and exploring new restaurants.
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Zhiyu Yang, MD
Affiliate, Medicine - Med/Gastroenterology and Hepatology
Visiting Scholar, Medicine - Med/Gastroenterology and HepatologyBioAs a clinical physician specializing in gastroenterology and hepatology, I am proficient in the clinical diagnosis and treatment of common gastrointestinal diseases and various liver diseases. My main research lay on metabolic related liver diseases and inflammatory bowel diseases.
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Margaret J. Zhou, MD, MS
Clinical Assistant Professor, Medicine - Gastroenterology & Hepatology
BioDr. Margaret Zhou is a board-certified, fellowship-trained gastroenterologist with Stanford Health Care. She also holds an appointment as clinical assistant professor at Stanford University School of Medicine.
She specializes in therapeutic endoscopy with expertise in treating Barrett’s esophagus and disorders of the pancreas and bile duct. In particular, she offers advanced endoscopic interventions to prevent, detect, and manage gastrointestinal (GI) cancers. These interventions include endoscopic mucosal resection, endoscopic ablation, endoscopic retrograde cholangiopancreatography, and endoscopic ultrasound. She is also interested in the management of esophageal disorders such as gastroesophageal reflux disease.
Dr. Zhou has published widely on improving the detection of precancerous lesions and cancers of the GI tract. She is particularly interested in prevention, early detection, and outcomes in Barrett’s esophagus, esophageal cancer, and stomach cancer. In addition, she has published on new technologies and the use of artificial intelligence in GI. Her research has been published in multiple journals including Clinical Gastroenterology and Hepatology; Clinical and Translational Gastroenterology; and Cancer Epidemiology, Biomarkers & Prevention.
Dr. Zhou is an active member of multiple national GI societies. She currently serves on the American Gastroenterological Association (AGA) Clinical Guidelines Committee and AGA Trainee and Early Career Committee. She also serves as an Associate Editor for Evidence-Based GI, an American College of Gastroenterology (ACG) journal.
