Main content

    Gastroenterology Fellowship

    Program Leadership  |  Course Directors  |  Teaching Faculty  |  Recent Graduates

    Program Leadership

    Richard Sundberg MD
    Chief of Gastroenterology, California Pacific Medical Center
    Dr. Sundberg is a graduate of Creighton University School of Medicine. He did his internship and residency at California Pacific Medical Center. He completed his Gastroenterology training at UCSD. He then returned to the Bay Area and joined the staff at CPMC. He has been involved with the fellowship teaching program since the 1980's, including attending in the GI clinic for over 20 years. His special interests include Quality Assessment and Improvement and he has chaired this committee position for over 25 years.

    Jesse Liu MD
    Gastroenterology Fellowship Program Director
    Dr. Liu is a graduate of the University of Maryland School of Medicine. He completed his internship, residency and chief residency in internal medicine and gastroenterology fellowship at California Pacific Medical Center. Following fellowship, he served for five years as an assistant professor of gastroenterology at Duke University in Durham, North Carolina. His love for medical education and affection for the Bay Area and CPMC, brought him back in 2013. Shortly thereafter, he assumed leadership of the gastroenterology fellowship program and is dedicated to continuing the tradition of excellence in gastroenterology training at CPMC. His passion is for innovative medical education and he aims to provide each fellow with a customized educational experience of the highest caliber. He continues to practice general gastroenterology and is especially interested in colorectal cancer, Helicobacter pylori and fine tuning the application of colonoscopy and endoscopy in day to day practice.

    Michael Verhille MD
    Gastroenterology Fellowship Associate Program Director
    Director of Outpatient Endoscopy and Clinic Education
    Dr. Verhille is a graduate of the University of Illinois School of Medicine. He completed his internship, residency and chief residency in internal medicine at CPMC, and gastroenterology fellowship at Thomas Jefferson University. Following fellowship, he returned to CPMC and private practice. Almost immediately he became involved in medical education. In 1995 he became program director of the CPMC GI Fellowship, a position he held until 2013. During this time the fellowship grew from a traditional small hospital apprenticeship model to a large academic program. He remains Associate Program Director. Dr. Verhille focuses on teaching outpatient clinical GI and endoscopy. He has focused research on endoscopic quality.

    Back to top

    Course Directors

    Nik Agarwal MD
    Director of Inflammatory Bowel Disease Education
    Dr. Agarwal is a graduate of Drexel University College of Medicine. He completed his residency at Cedars Sinai Medical Center and his fellowship at the University of California, Los Angeles. His clinical and research interests are in gastrointestinal motility disorders, inflammatory bowel disease and general gastroenterology.

    Taft Bhuket MD
    Division Chief, Gastroenterology & Hepatology
    Highland Hospital/Alameda Health System
    Dr. Bhuket is a graduate of the University of Texas Southwestern Medical School in Dallas. He completed his internal medicine residency at UT Southwestern/Parkland Hospital and his gastroenterology fellowship at the University of Michigan where he was appointed Chief GI Fellow. Dr. Bhuket joined the faculty of the Department of Medicine at Highland Hospital in 2008 and has served as the Division Chief of Gastroenterology and Hepatology and the Director of Endoscopy since his arrival. He has also served as Chief of the Medical Staff at Highland. His primary professional interests are access to specialty care for the underserved, clinical education, and clinical operations. His clinical interests are colorectal cancer, inflammatory bowel disease, and complications of liver disease.

    Cathy Cabansag MD
    Director of Nutrition Education
    Dr. Cabansag is a native of California and graduated from Loma Linda University School of Medicine. She subsequently completed her internship and residency in internal medicine and fellowship in gastroenterology at California Pacific Medical Center. The exceptional quality of the subspecialty GI departments at CPMC persuaded her to remain a part of the CPMC community after her training. She has enjoyed practicing general gastroenterology since 2011. Dr. Cabansag has a special interest in nutrition and women’s health issues including colorectal cancer screening in women. She feels privileged to have the opportunity to teach GI fellows, residents and medical students.

    Todd Frederick MD
    Hepatology Fellowship Program Director
    Dr. Frederick is a graduate of New York Medical College. He completed his internship, residency, and fellowship at the University of California, San Diego. Following fellowship he joined the faculty at California Pacific Medical Center in the Department of Transplantation, Division of Hepatology in 2004. He has served as the Director of Clinical Protocols and the Director of Quality for the Hepatology Division since 2005. He has also served as the Director of the Transplant Hepatology Fellowship at CPMC since 2012. Aside from his busy clinical practice, he also actively participates in Clinical Research with a focus on complications of cirrhosis, portal hypertension, acute on chronic liver failure, and treatment of HCV.

    Lauren Gerson MD
    Director of Research Education
    Dr. Lauren Gerson is a graduate of SUNY Buffalo School of Medicine. She completed her internship, residency and chief residency in Internal Medicine at California Pacific Medical Center. She completed her fellowship in Gastroenterology at Stanford University School of Medicine during which time she completed a Master's Degree in Health, Research, and Policy. After fellowship, she served as an Assistant and then Associate Professor of Medicine/Gastroenterology at Stanford from 2000-2013 where she specialized in gastrointestinal motility disorders and evaluation of obscure GI bleeding. She returned to CPMC as a practicing gastroenterologist in 2013 where she also serves as Director of Clinical Research for the Gastroenterology Fellowship Program and is an Associate Clinical Professor of Medicine at UCSF. Lauren continues to be very active in the teaching of UCSF medical students, CPMC residents and GI fellows in addition to mentoring trainees in the conduction of clinical research projects. Her clinical and research interests include general gastroenterology, gastroesophageal reflux disease and its associated complications, motility disorders, GI bleeding, capsule endoscopy, small bowel bleeding, outcomes research and conduction of meta-analyses and cost-effectiveness models.

    Chris Hamerski MD
    Director of Pancreaticobiliary Education
    Director of Luminal Oncology - California Pacific Medical Center
    Dr. Hamerski is a graduate of University California San Francisco (UCSF) School of Medicine. He completed his internal medicine residency at UCSF and Gastroenterology Fellowship at University of California Irvine and Interventional Endoscopy Fellowship at University of California Los Angelas (UCLA). His clinical interests include advanced endoscopic mucosal resection, endoscopic therapy of submucosal lesions, pancreaticobiliary endoscopy, pseudo cyst drainage and ampullectomy.

    Edward Holt MD
    Hepatology Fellowship Associate Program Director
    Director of Hepatology Education
    Dr. Holt is a graduate of the Medical University of South Carolina. He completed his internship and residency at the Massachusetts General Hospital in Boston, followed by gastroenterology and transplant hepatology fellowships at California Pacific Medical Center. He has served as the Associate Program Director of the CPMC transplant hepatology fellowship and the Director of Fatty Liver Disease at CPMC since 2013. He staffs hepatology outreach clinics in Oakland, Fresno and Eureka but spends the majority of his clinical time in San Francisco, where he teaches fellows and residents in the liver clinics and on the wards. Dr. Holt participates in investigator-initiated and industry-sponsored clinical research in nonalcoholic fatty liver disease. He is a regular speaker at internal medicine, gastroenterology and transplant hepatology teaching conferences and mentors house staff with well-developed interests in hepatology.

    Benny Liu MD
    Associate Division Chief, Gastroenterology & Hepatology
    Highland Hospital/Alameda Health System
    Dr. Benny Liu is a graduate of The University of Texas Medical Branch. He completed his internal medicine internship and residency at The University of Michigan. Following his residency, he completed an NIH sponsored fellowship in gastroenterology and hepatology at the University of Texas Southwestern Medical Center where in addition to clinical training he pursued basic science research in the fields of lipid metabolism and lysosomal storage diseases. After completing his fellowship he joined the faculty at the University of Texas Southwestern Medical Center. In 2012 he relocated to the Bay Area and joined the gastroenterology faculty at Alameda Health System - Highland Hospital where he also holds an appointment as Assistant Clinical Professor of Medicine at the University of California San Francisco School of Medicine. He currently serves as the Associate Division Chief of Gastroenterology and Hepatology and Director of the GI and Liver clinics at Highland Hospital.

    Mimi Lin MD
    Director of Neurogastroenterology and Motility Education
    Dr. Lin is a graduate of the Albert Einstein College of Medicine in New York. She completed her internship, residency, and chief residency in internal medicine at California Pacific Medical Center (CPMC). She then completed her gastroenterology fellowship at CPMC with further specialization in gastrointestinal motility disorders. In 2011 Dr. Lin returned to the CPMC family and joined the Center for Neurogasterology and Motility with research interests focused on innovative methods to assess and manage motility disorders such as: reflux and swallowing disorders, nausea and vomiting with or without gastroparesis, gastric stimulation, and small and large bowel dysfunction. In addition to her clinical work, Dr. Lin is passionate about patient education and health care advocacy. She has represented the national gastroenterology organization on Capitol Hill to advocate for congressional support related of the Colorectal Cancer Early Detection, Prevention and Treatment Act.

    William Snape MD
    Director Center for Neurogastroenterology and Motility
    Dr. Snape is a graduate of Jefferson Medical College. He completed his internship and residency in internal medicine at Bronx Municipal Hospital of Albert Einstein School of Medicine. Following residency, he completed his gastroenterology fellowship at the University of Pennsylvania. After completing fellowship, he joined the gastroenterology faculty at the University of Pennsylvania. He moved to Los Angeles as Professor of Medicine at UCLA and director of gastroenterology at Harbor-UCLA Medical Center. He presently is director of Neurogastroenterology and Motility at California Pacific Medical Center. His clinical and research interests are functional diseases of the gastrointestinal tract with a specific interest in gastroparesis. He is principal investigator at California Pacific Medical Center for the NIH sponsored gastroparesis registry.

    Robert Wong MD
    Course Director - Highland Endoscopy
    Dr. Wong is a graduate of the University of California San Francisco School of Medicine. He completed his internship and residency in internal medicine at California Pacific Medical Center. Following residency, he completed his gastroenterology and hepatology fellowship at Stanford University Hospitals and Clinics during which time he also completed his Masters in Clinical Epidemiology. After completing fellowship, he joined the gastroenterology faculty at Alameda Health System - Highland Hospital, where he also holds an appointment as Assistant Clinical Professor of Medicine at University of California San Francisco School of Medicine. His clinical interests include viral hepatitis and chronic liver disease. His research interests include clinical epidemiology and outcomes research with a focus on chronic liver disease and gastrointestinal malignancies.

    Back to top

    Teaching Faculty

    • Jeffrey Aron MD
      Clinical Instructor
    • Frank Farrell MD
      Clinical instructor
    • Ken Hammerman MD
      Clinical Instructor
    • Annette Kwon MD
      Clinical Instructor
    • Martin Liberman MD
      Clinical Instructor
    • Aristotle Mendiola MD
      Clinical Instructor
    • Steven Pardys MD
      Clinical Instructor
    • Susan Ripper MD
      Clinical Instructor

    Back to top

    Recent Graduates

    YearMDInstitutionLocation
    2015Susan Ripper MDPrivate Practice San Francisco, CA
    2014Ripple Sharma MDPrivate PracticeGreenbrae, CA
    2014Dayana Carcamo Molina MDPrivate PracticeMartinez, CA
    2013Kidist Yiman MDTransplant HepatologyCPMC
    2012Edward Holt MDTransplant HepatologyCPMC
    2011Michelle Tana MDHepatologyUCSF/SFGH
    2010Cathy Cabansag MDPrivate PracticeSan Francisco, CA
    2009Liz Clark MDKaiser PermanenteWalnut Creek, CA
    2008Mimi Lin MDNeurogastroenterologyCPMC
    2007Katerina Shetler MDPAMFMountain View, CA
    2007Jesse Liu MDPrivate PracticeSan Francisco, CA
    2006Christine Pizzute MDPrivate PracticeSeattle, WA
    2005Ann Chen MDInterventional EndoscopySan Jose, CA
    2004Linda Nguyen MDDirector of NeuroGIStanford University
    2003Tami Daugherty MDTransplant HepatologyStanford University
    2002Dan Reinsdorf MDPrivate PracticeRedwood City, CA
    2001Sheila Savur MDPrivate PracticeSan Jose, CA
    2000Aris Mendiola MDPrivate PracticeSan Francisco, CA


    Back to top