Eric Mao, M.D.

Eric J. Mao, M.D.


Gastroenterology and Hepatology

Inflammatory Bowel Disease


Internal Medicine


  • Director, UC Davis Inflammatory Bowel Disease Center
  • Assistant Clinical Professor


To see if Eric J. Mao is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).

UC Davis Midtown Ambulatory Care Center

3160 Folsom Blvd, Suite 3500
Sacramento, CA 95816
Driving Directions

Primary Phone:

Additional Phone Numbers

Clinic Phone: 916-734-8616
Clinic Fax: 916-734-0804
Physician Referrals: 800-4-UCDAVIS (800-482-3284)

Philosophy of Care

I believe that every individual is unique. My goal is to partner with each individual to develop a care plan that will control disease and prevent complications. I believe in a team approach to inflammatory bowel disease care where we work closely with colorectal surgery, rheumatology, dermatology, nutritionist, pharmacist, and a dedicated nursing staff.

Clinical Interests

Dr. Mao is a gastroenterologist who specializes in the care of inflammatory bowel diseases including Crohn's disease and ulcerative colitis. He has significant experience caring for inflammatory bowel disease during pregnancy. He also has a special clinical interest in checkpoint inhibitor colitis.

Research/Academic Interests

Dr. Mao is interested in the development of novel inflammatory bowel disease therapy and participates in cutting-edge clinical drug trials. He has focused on improving preventive care in inflammatory bowel disease patients. He is also interested in characterizing the prevalence and natural history of inflammatory bowel disease in understudied patient populations.


Gastroenterology and Hepatology

Center/Program Affiliation

UC Davis Medical Group


M.D., Alpert Medical School at Brown University, Providence RI 2011

B.A., Brown University, Providence RI 2007

Internship: Internal Medicine, Brown University/Rhode Island Hospital, Providence RI 2011-2012


Internal Medicine, Brown University/Rhode Island Hospital, Providence RI 2012-2014


Gastroenterology and Hepatology, Brown University/Rhode Island Hospital, Providence RI 2014-2017

Inflammatory Bowel Disease, UC San Francisco, San Francisco CA 2017-2018

Board Certifications

American Board of Internal Medicine,

American Board of Internal Medicine, Gastroenterology and Hepatology,

Professional Memberships

American College of Gastroenterology

American Gastroenterology Association

Crohn's and Colitis Foundation

Northern California Society for Clinical Gastroenterology

Select Recent Publications

Mao EJ, Sheibani S, Martin C, Bloomfeld RS, Isaacs K, Saha S, Mahadevan U. Preventive Health Care Among Postpartum Women With Inflammatory Bowel Disease: Results From the PIANO Registry. Inflamm Bowel Dis. 2019 Mar 14;25(4):797-802.

Mao EJ, Lewin S, Terdiman JP, Beck K. Safety of dual biological therapy in Crohn's disease: a case series of vedolizumab in combination with other biologics. BMJ Open Gastroenterol. 2018 Nov 9;5(1):e000243.

Mao EJ, Mahadevan U. The Debate is Over: Continue Anti-Tumor Necrosis Factor Therapy Throughout Pregnancy. Am J Gastroenterol. 2018 Nov;113(11):1590-1591.

Mao EJ, Hazlewood GS, Kaplan GG, Peyrin-Biroulet L, Ananthakrishnan AN. Systematic review with meta-analysis: comparative efficacy of immunosuppressants and biologics for reducing hospitalisation and surgery in Crohn's disease and ulcerative colitis. Aliment Pharmacol Ther. 2017 Jan;45(1):3-13.

Mao EJ, Kelly CR, Machan JT. Racial Differences in Clostridium difficile Infection Rates Are Attributable to Disparities in Health Care Access. Antimicrob Agents Chemother. 2015 Oct;59(10):6283-7