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Naoki Chiba, M.D., M.Sc.

(Pronouns: he/him/his)

Contact Information

Phone Numbers

Office: (585) 275-4711

Faculty Appointments


I am Canadian trained - medical school at Western University, London, Ontario, and Internal Medicine residency and fellowship in Gastroenterology at McMaster University, Hamilton Canada. I am dual board certifed by the RCPSC (Royal College of Physicians and Surgeons of Canada). I have been in community practice my entire career and did therapeutic ERCP for nearly 30 years. I have a masters degree in clinical epidemiology. I have research interests, mostly in upper GI disorders - like ulcer disease, reflux and H. pylori a bacteria in the stomach and how to treat this infection is a particular research interest. I am interested in clinical medicine and helping you, the patient, as much as possible, realizing that I cannot wave a wand and make any issue disappear. I have always been a patient advocate.

Professional Background

I am a Canadian trained physician, attending University of Western Ontario for medical school, then McMaster University, Hamilton, Ontario for Internal Medicine residency and Gastroenterology Fellowship. I did an extra clinical research year and also obtained further training in therapeutic ERCP. I was in private practice gastroenterology in Guelph, Ontario until 2019 and during that time was clinical faculty at McMaster University, becoming Clinical Professor in 2013. I worked for a 2 year stint in PEI, Canada before coming to URMC.

I have interest in evidence-based medicine with a MSc from McMaster University in clinical epidemiology and biostatistics. I have participated in numerous randomized, controlled trials. I have developed many professional guidelines and teaching programs for physicians. I am a fellow of the American Gastroenterological Association (AGAF 2011), the Canadian Association of Gastroenterology (CAGF 2015) and the American College of Gastroenterology (FACG 2022).


My research interests started with Helicobacter pylori. I published the first meta-analysis (1992) on the treatment of Hp and treatment has been and remains my primary interest (Toronto consensus 2016). I have looked at the effects of Hp on dyspepsia and with the CADET (Canadian Adult Dyspepsia Empiric Treatment) study group, we performed a number of relevant, randomized controlled trials to get direct evidence to develop management guidelines for upper GI symptoms/disorders (CanDys guidelines). I am interested in the related areas of upper GI - GERD. I have contributed to national guidelines in GERD consensus conferences. I am an expert in PPI's, a mainstay of treatment of upper GI disorders. Teaching practising physicians has always been a keen interest. I also have background in evidence-based medicine with a masters degree from McMaster University, Hamilton, Canada.



MD | Canada-U Western Ontario, London

MSc | Canada-McMaster Univ, Hamilton
Health Care Research


Fellow of the American College of Gastroenterology (FACG)

Fellow of the Canadian Association of Gastroenterology (CAGF)

Fellow of the American Gastroenterological Association (AGAF)

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