Advanced Therapeutic Endoscopy


Internal Medicine


  • Clinical Professor
  • Director of Gastroenterology, Sutter Roseville Medical Center


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

Philosophy of Care

I always try my very best to ensure that every patient does better after seeing me. I also appreciate each individual patient as an inspiration to learn and enhance my clinical judgment to help future patients.

Clinical Interests

Management of Barrett's esophagus, dysplasia and esophageal cancer with radiofrequency ablation, endoscopic mucosal resection, photodynamic therapy; Therapeutic Endoscopic Retrograde Cholangiopancreatography for pancreatobiliary diseases; Inflammatory Bowel Disease and educational outreach programs; Colorectal Cancer Screening and Prevention.

Research/Academic Interests

Educational Interests: Advanced Therapeutic Endoscopy; Inflammatory Bowel Disease Outreach Educational Program; Barrett's esophagus, dysplasia and Esophageal cancer.


Gastroenterology and Hepatology


M.B., B.Ch., University of Wales, College of Medicine, Cardiff, Wales, United Kingdom 1985

Internship: General Medicine and Surgery, University Hospital of Wales, United Kingdom, 1986


Internal Medicine, California Pacific Medical Center, San Francisco CA 1989

Sisters of Charity Hospital, State University, New York NY 1987


Advanced Therapeutic Endoscopy, Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, 1991

FRCP (Edin), Royal College of Physicians, Edinburgh, UK

Gastroenterology, Hepatology, & Advanced Therapeutic Endoscopy, UC Davis Medical Center, Sacramento CA 1994

Board Certifications

American Board of Internal Medicine, 1989

American Board of Internal Medicine, Gastroenterology and Hepatology, 1993

Professional Memberships

American College of Gastroenterology

American College of Physicians

American Gastroenterological Association

American Gastroenterological Association Academy of Educator

American Society of Gastrointestinal Endoscopy

Hong Kong Academy of Medicine

Hong Kong College of Physicians

Royal College of Physicians, Edinburgh, United Kingdom

Honors and Awards

Nominated Regional Adviser for USA West (California, Utah, Colorado, and Nevada) from 2019-2024, 2019

American College of Gastroenterology Governor of Northern California (2019-2022), 2019

Co-Chair, California Medical Advisory Committee, Crohn's and Colitis Foundation Northern California Chapter, 2019

Fellowship of the Royal College of Physicians London, 2018

Scopy Award for a campaign in promoting Colorectal Cancer Screening from the American College of Gastroenterology, 2016

Excellence in Patient Satisfaction Award for Sutter Independent Physicians Sacramento, 2015

Endoscopy Unit Recognition Program awarded to Sutter Roseville Endoscopy Center by ASGE, 2013

Honoree for Achievement in Endoscopy Education by American Society of Gastrointestinal Endoscopy (ASGE) 2013, 2014

Select Recent Publications

R. Hsu. Chapter editor for Crohn’s disease and Ulcerative Colitis – StatPearls On-line peer reviewed CME/CE medical library. 2016.

R. Hsu, N. Stollman. Fecal Microbiota Transplantation. Patient Education Web Chapter. American College of Gastroenterology. 2016.

R Hsu, A. Yu, J. Lee, J Leung. Pancreatitis caused by common bile duct stones in a 3 year old boy with prior surgery for a choledochal cyst. Am J Gastro. 2001;96;6:1919-1921.

R Hsu, R Wolfgang. Which Drug Class is best for GERD? Patient Care. 2000 Sept;26-44.

RK Hsu, P Draganov, P Cotton, JW Leung, AS Yu, PR Tarnasky, JT Cunningham, RH Hawes. Therapeutic ERCP in the management of pancreatitis in children. Gastrointest Endosc. 2000;51:396-400.

J. Lee, R. Hsu, J Leung. Are self –expanding metal mesh stents useful in the treatment of benign esophageal stenosis and fistulas? An experience of four cases. Am J Gastro. 2000;95,8:1920-1925.

Lee JG, Turnispseed S, Romano PS, Vigil H, Hsu RK, Azari R, Kirk D, Melnikoff N, Sokolove P, Leung J. Endoscopy based triage significantly reduces hospitalization rates and costs of treating upper gastrointestinal bleeding: a randomized controlled trial. Gastrointest Endosc. 1999; 50:755-61.

Sung JY, Hsu RK, Chan FK, Liew CT, Lau JW, Li AK. Crohn's disease in the Chinese population. An experience from Hong Kong. Diseases of the Colon and Rectum. 1994;37(12):1307-9.

Hsu RK, Lai CW, Lo KK, Leung JWC. Mucin secreting cholangiocarcinoma associated with Clonorchiasis. Digestive Endoscopy. 1992;4:456-459.

Hsu RK, Cole E, Routledge P. Childhood poisoning in Wales: Experience of the Welsh National Poison Unit (1984). Human Toxicology. 1986; 5:373-376.