Digestive Health Institute

As a national leader in digestive care and the top-ranked Gastroenterology and GI Surgery center in OC, Hoag provides expert care across the full spectrum of digestive disease. Patients have access to a host of groundbreaking technologies, world-class specialists, clinical trials, diagnostics & imaging, and advanced interventional therapeutics.

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Advanced Endoscopy

Delivering precise diagnosis and treatment for complex digestive diseases and cancers using advanced imaging and interventional techniques.

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Bariatric Surgery and Weight Loss

A nationally accredited program offering personalized weight loss and metabolic care with support in nutrition, exercise, and mental health.

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Colorectal

Comprehensive prevention and treatment for colorectal and bowel conditions, including cancer, from a team of expert specialists.

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Foregut (Esophagus & Stomach)

Integrated medical and surgical expertise for advanced care of esophageal and stomach disorders.

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Liver Program

Coordinated, innovative care for every stage of liver disease, from diagnosis through treatment and recovery.

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Inflammatory Bowel Disease (IBD)

Multidisciplinary care to help patients with Crohn’s, colitis, and related conditions restore health and quality of life.

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When you need unparalleled expertise.

Top Hospital in OC for Gastroenterology & GI Surgery

Hoag has been ranked high performing nationally by U.S. News and World Report for Gastroenterology & GI Surgery for 2025-2026. In addition, Hoag was ranked the #4 hospital in the Los Angeles Metro Area and the #9 hospital in California, and is the only Orange County hospital in the top 10.

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Our team is made up of nationally renowned physicians specializing in digestive care.

Meet the team

“My life has been extended. I don’t know what would have happened had I not gone to Dr. Chang at the Digestive Health Institute. My life changed because of him. For sure.”
Rick Letterman, Patient of Dr. Chang