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Contact Us

If you are a patient in need of an appointment, please call 888-717-GIMD (888-717-4463).


Division of Gastroenterology
Department of Medicine
UC Irvine School of Medicine
333 City Blvd. West, Suite 400
Orange, CA 92868
Phone: 714-456-6745 (Academic Office - Non-patient related)
Fax: 714-456-7753

Kenneth J. Chang, MD, FACG, FASGE
Chief, Division of Gastroenterology and Hepatology

Yvonne Nguyen
Assistant to the Division Chief

Sheila Anaya
Operations Manager

Deanna Orozco
Research Coordinator

Sonha Castelli
Fellowship Coordinator

Clinical Locations

H.H. Chao Comprehensive Digestive Disease Center
UC Irvine Medical Center
101 The City Drive South, Bldg. 22-C
Orange, CA 92868
Patient Line 888-717-4463
Map & Directions

UC Irvine Health Gottschalk Medical Plaza
2100 Medical Plaza Drive
Irvine, CA 92697-6250
Patient Line 949-824-8639
Map & Directions

UC Irvine Health Tustin
1451 Irvine Blvd
Tustin, CA 92780
Map & Directions

UC Irvine Health Newport
Pacific Medical Plaza
1640 Newport Blvd, Suite 350
Costa Mesa, CA 92627
Patient Line 949-386-5260
Map & Directions

UC Irvine Health Gastroenterology – Corona
Village Medical Arts Plaza
341 Magnolia Ave, Suite 207
Corona CA 92879
Map & Directions