John O'Brien Clarke III MD
Esophagus Disease, Gastrointestinal Functional & Motility Disorders
Clinical Professor, Medicine - Gastroenterology & Hepatology, Stanford School of Medicine
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300 Pasteur DrPalo Alto, CA 94304
Phone+1 650-723-4000
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Summary
- Dr. John Clarke is a gastroenterologist in Palo Alto, CA and is a Clinical Professor of Medicine at Stanford University, where he is also Director of the Esophageal Program and Vice-Chief of Education in the Division of Gastroenterology & Hepatology. He received his medical degree from Columbia University Vagelos College of Physicians and Surgeons and has been in practice 20 years. Internship, residency and fellowship were completed at Johns Hopkins University and he completed esophageal subspecialty training at Northwestern University. He specializes in esophageal disease and gastrointestinal functional & motility disorders. He has more than 100 publications and over 500 citings.
Education & Training
Johns Hopkins UniversityFellowship, Gastroenterology, 2004 - 2007- Johns Hopkins UniversityResidency, Internal Medicine, 1999 - 2002
Columbia University Vagelos College of Physicians and SurgeonsClass of 1999
Certifications & Licensure
CA State Medical License 2016 - 2026
MD State Medical License 2002 - 2016
American Board of Internal Medicine Internal Medicine- American Board of Internal Medicine Gastroenterology
Publications & Presentations
PubMed
- Mild to moderate GERD before sleeve: Can we better predict post-operative GERD?Justine O Chinn, Perisa Ruhi-Williams, Mark Shacker, Micaela M Esquivel, Patricia Garcia
Surgical Endoscopy. 2025-08-28 - Management of Barrett's Esophagus in the Context of Achalasia.Margaret J Zhou, John O Clarke
Current Gastroenterology Reports. 2025-07-28 - Knowledge of Patients' Activation Level Changes Expert US Physicians' Communication in GERD Management.Afrin N Kamal, Sudharshan Achalu, Shilpa Jani, George Triadafilopoulos, John O Clarke
Journal of Clinical Gastroenterology. 2025-07-01
Press Mentions
What Causes Heartburn?June 6th, 2021
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