Medical Groups & Affiliations
- Mission Heritage Medical Group
- Mission Hospital Affiliated Physicians
Additional Languages Spoken
English, Mandarin Chinese, Taiwanese
27871 Medical Center Rd #200
Mission Viejo, CA 92691
Dr. Chang is a Board Certified Gastroenterologist who specializes in the
evaluation and management of disorders of the gastrointestinal tract,
pancreas, bile duct, and liver.
He performs upper endoscopy and colonoscopy to screen for, diagnose, and
treat a variety of gastrointestinal diseases and cancers.
He also has expertise in several advanced endoscopic techniques including
endoscopic retrograde cholangiopancreatography (ERCP), a procedure that
is used to manage stones, strictures, and malignant obstruction of the
bile duct. He is fluent in English, Mandarin, and Taiwanese.
Dr. Chang graduated with degrees in molecular biology and economics from
the Northwestern University, and received his medical degree from the
Northwestern University Medical School. After finishing residency training
in Internal Medicine from the Baylor College of Medicine, he completed
a fellowship in gastroenterology and hepatology at the UCLA School of Medicine.
During his fellowship, Dr. Chang was recruited into the Specialty Training
and Advanced Research program at UCLA, where he conducted research in
gut immunity and inflammatory bowel disease. In recognition of this research,
he was granted a philosophical doctorate degree from the Department of
Microbiology, Immunology, and Molecular Genetics at UCLA.
He also received several awards for this work, including grants from the
National Institute of Health and the Crohn's and Colitis Foundation
Following his fellowship training at UCLA, Dr. Chang pursued another year
of advanced endoscopic fellowship at the UCSF School of Medicine, where
he developed expertise in therapeutic ERCP, endoscopic ultrasound, gastrointestinal
stricture remediation, and other advanced endoscopic procedures.
Dr. Chang has published numerous abstracts and articles in the field of
gut immunity, inflammatory bowel disease, and pancreaticobiliary disorders
in peer-reviewed journals such as Gastroenterology, Journal of Clinical
Investigation, and Journal of Immunology.
He is a member of the American Gastroenterology Association, American Society
of Gastrointestinal Endoscopy, American College of Gastroenterology, and
American Medical Association.
Northwestern University School of Medicine
Baylor College of Medicine-Houston
Baylor College of Medicine-Houston
UCSF Medical Center at Parnassus 2008
UCLA Medical Center 2007
Board Certified in
American Gastroenterology Association
American Society of Gastrointestinal Endoscopy
American College of Gastroenterology
American Medical Association
Areas of Expertise
Colon cancer screening
Heartburn or acid reflux
Peptic ulcer disease
Inflammatory bowel disease
National Institute of Health Grant
Crohn's and Colitis Foundation of America Grant
*Note: The data contained within an individual physician’s profile has
been provided by that physician’s office. The information contained
within the profile has been compiled from multiple sources deemed to be
reliable, however the accuracy cannot be guaranteed or warranted by us
or the health system. Please contact the physician’s office at the
phone number above if you have any questions or to verify the information
given. We or the health system are not liable or responsible for incorrect
or inaccurate information supplied on the profile or for any reliance
upon that information.