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Chul S. Hyun, MD, PhD, MPH

Director, Gastric Cancer Prevention and Screening Program, Medicine
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Contact Info

chul.hyun@yale.edu

Yale School of Medicine

Department of Medicine (Digestive Diseases) , P.O. Box 208019

New Haven, CT 06520-8019

United States

About

Titles

Director, Gastric Cancer Prevention and Screening Program, Medicine

Biography

Dr. Chul S. Hyun earned his B.S. from Johns Hopkins University and M.D. from the University of Miami School of Medicine. He completed his Internal Medicine Internship and Residency at Georgetown University Medical Center, followed by a Gastroenterology and Liver Fellowship at Yale University School of Medicine. Additionally, he holds a Ph.D. in Biophysics from the University of Rochester School of Medicine and an MPH from Columbia University. Dr. Hyun furthered his academic journey with a postdoctoral fellowship in Physiology at the University of Chicago School of Medicine.

Board-certified in Gastroenterology, Dr. Hyun served as a faculty member in the Division of Gastroenterology and Hepatology at Weill Cornell Medical College from 1996 to 2018. He has held numerous leadership roles, including Board Member of the New Jersey State Board of Medical Examiners (2017–2018), President of the Korean American Medical Association (2011–2013), and Founding President of the World Korean Medical Organization (2012–2015).

Currently, Dr. Hyun is the publisher of NexBioHealth, a quarterly magazine dedicated to mentoring and fostering the next generation of medical students and young physicians worldwide. He has established several nonprofit health organizations, such as the Center for Viral Hepatitis (CVH) and the Stomach Cancer Task Force (SCTF). Additionally, he is an accomplished author whose work addresses community health and health disparities.

As the inaugural director of the Gastric Cancer Prevention and Screening Program at Yale School of Medicine, Dr. Hyun leverages decades of clinical expertise in gastric and gastrointestinal care. His mission is to advance the prevention, early detection, and management of gastric cancer, with a focus on reducing health disparities associated with the disease in the United States.

A passionate marathon runner, Dr. Hyun has completed 120 marathons around the world. In his recently published memoir, I Just Came to See You, he writes, “Life is a marathon, not a sprint.” This poignant book chronicles his extraordinary journey from childhood in South Korea to a life of global achievements. It offers readers a compelling narrative about resilience, culture, and identity while inspiring them to pursue their dreams regardless of the challenges they face.

Last Updated on November 23, 2024.

Departments & Organizations

Education & Training

MPH
Columbia University Mailman School of Public Health, Public Health (2022)
Fellow
Yale School of Medicine (1992)
Intern and Resident
Georgetown University School of Medicine (1989)
MD
University of Miami School of medicine, Medicine (1986)
Postdoctoral Fellow
University of Chicago Pritzker School of Medicine (1984)
PhD
University of Rochester School of Medicine and Dentistry, Biophysics (1982)
BS
Johns Hopkins University, Biophysics (1977)

Research

Research at a Glance

Publications Timeline

A big-picture view of Chul S. Hyun's research output by year.
10Publications
91Citations

Publications

2024

2021

2020

2019

2017

2016

2015

Clinical Care

Overview

Dr. Chul S. Hyun is a gastroenterologist with expertise in gastrointestinal and liver diseases, with a special focus on the prevention, early detection, and management of gastric cancer.

As the inaugural Director of the Gastric Cancer Prevention and Screening Program at Yale School of Medicine—the first program of its kind at an academic institution in the United States—Dr. Hyun leads efforts that span clinical care, education, research, implementation science, and policy advocacy. His work is rooted in reducing disparities in care for gastric cancer through innovative, community-anchored strategies and migration-informed risk assessment.

“I was drawn to gastroenterology because it brings together nearly every branch of medicine—physiology, immunology, endocrinology, infectious diseases, oncology, and more,” Dr. Hyun says. “In fact, I started out in basic science, studying ion transport in intestinal epithelial cells, so the move into GI was a natural evolution.”

Dr. Hyun is passionate about connecting with patients and communities on a human level. “My goal is to empower patients with knowledge and ensure they feel supported every step of the way,” he says. “I want people to see me not just as a physician, but as another human being—someone who’s genuinely interested in getting to know them and improving their health.”

“What I value most about this work is the opportunity to make a lasting difference—whether it’s through direct patient care, community education, or pushing for systemic change,” Dr. Hyun says. “Watching these efforts translate into real-world impact is what keeps me motivated every day.”

Dr. Hyun earned his undergraduate degree from Johns Hopkins University and his medical degree from the University of Miami School of Medicine. He completed his internal medicine residency at Georgetown University Medical Center and a fellowship in gastroenterology at Yale School of Medicine. He also holds a PhD in Biophysics from the University of Rochester, followed by a postdoctoral fellowship in cell physiology at the University of Chicago, and a Master of Public Health from Columbia University.

Clinical Specialties

Internal Medicine; Digestive Diseases

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Mailing Address

Yale School of Medicine

Department of Medicine (Digestive Diseases) , P.O. Box 208019

New Haven, CT 06520-8019

United States

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