School of Medicine


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  • Walter Park

    Walter Park

    Assistant Professor of Medicine (Gastroenterology and Hepatology) at the Stanford University Medical Center

    Current Research and Scholarly Interests Dr. 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.

  • Vijay Pottathil

    Vijay Pottathil

    Clinical Assistant Professor, Medicine - Gastroenterology & Hepatology

    Bio I was raised in La Jolla, California. Several family members are scientists including both parents and eldest sister. I have a sister in the Bay Area who is a realtor.
    My wife is a pediatric Otolaryngologist at Stanford University. We are blessed with three children. I am interested in General Gastroenterology, Endoscopy, and teaching.

  • Peter Poullos

    Peter Poullos

    Clinical Associate Professor, Radiology

    Bio Dr. Poullos is a native of Stockton California. He attended Santa Clara University where he earned his BS in Biology. He received his M.D. degree at the University of Texas Medical School at Houston, after which he did 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 University Medical Center, where he interprets CT, MRI, and ultrasound primarily of the abdomen and pelvis. His interests include radiology of the acute abdomen, hepatobiliary imaging, and colorectal cancer screening.

    Dr. Poullos is Founder and Executive Director of the Stanford Medicine Abilities Coalition (SMAC), a group composed of people with disabilities and their allies at Stanford Medicine. He is also a member of the Radiology Department Diversity Committee, the School of Medicine Faculty Senate Subcommittee on Diversity, and the School of Medicine Diversity Cabinet.