- ABOUT ME
- AREAS OF FOCUS
- EDUCATION & LEADERSHIP
- LOCATIONS & HOSPITALS
- NEWS & PUBLICATIONS
Dr. Johnny Ting Zheng specialized in gastroenterology because it allows him to help his patients with both medications and endoscopic therapies. He believes that the needs of the patient come first, and strives to empower his patients through a holistic care approach that emphasizes education on diseases of the GI tract and lifestyle changes.
Dr. Zheng completed advanced training in gastroenterology alongside experts at the prestigious Mayo Clinic. In addition to general gastroenterology, he has a special interest in motility disorders of the GI tract such as achalasia, gastroparesis, and irritable bowel syndrome (IBS). Dr. Zheng also performs endoscopic treatment for patients with Barrett’s esophagus, using ablation, cryotherapy, or endoscopic resection.
Dr. Zheng finds it incredibly rewarding to help his patients improve with treatment. He loves when patients begin eating normally and regaining weight after a correct diagnosis and treatment for their severe swallowing issues, or helping a patient struggling with Barrett’s esophagus to feel better and prevent cancer in the esophagus with medications and endoscopy.
Outside of work, Dr. Zheng spends his time with family, taking his three young children to the many outdoor and indoor activities Portland has to offer. He also enjoys pursuing his technology hobby by building his own gaming computer, home theater, personal media streaming solution, and smart home ecosystem.
Dr. Zheng speaks fluent Mandarin.
Volunteer Activities
AGA Editorial Fellow for Clinical Gastroenterology and Hepatology, 2022-2023
International Foundation for Gastrointestinal Disorders Junior Academicians Program
Other Activities
American Gastroenterological Association
American College of Gastroenterology
American Society for Gastrointestinal Endoscopy
Areas of Focus
Colon Cancer Screening & Prevention
Gastroesophageal Reflux Disease (GERD)
Barrett’s Esophagus Treatment
Esophageal & Gastrointestinal Motility Disorders
Celiac Disease
Inflammatory Bowel Disease (IBD)
Irritable Bowel Syndrome (IBS)
EDUCATION & TRAINING
Fellowship, Advanced Esophageal Disease, Mayo Clinic, 2025
Fellowship, Gastroenterology and Hepatology, Mayo Clinic, 2023
Residency, Internal Medicine, Michigan Medicine, 2020
MD, Case Western Reserve University School of Medicine, 2017
BS, Biomedical Engineering, University of Rochester, 2012
BOARD CERTIFICATION
Gastroenterology
HONORS
Mayo Clinic J. Arnold Bargen Award for Excellence in Research, 2023
ANMS Advanced Motility Program for Fellows Award, 2023
American Neurogastroenterology and Motility Society Young Investigator Award, 2022
American College of Gastroenterology Outstanding Poster Presenter Award, 2022
Mayo Clinic NIH T-32 Research Grant, 2020-2023
American Society of Anesthesiologists Medical Student Research Fellowship Award, 2014
Graduated with Highest Distinction and Cum Laude, University of Rochester, 2012
Tau Beta Pi Engineering Honor Society, 2010
Locations
Hospitals Served
- Providence St. Vincent Medical Center
Publications
Zheng T, BouSaba J, Taylor A, Dilmaghani S, Busciglio I, Carlson P, Torres M, Ryks M, Burton D, Harmsen WS, Camilleri M. A Randomized, Controlled Trial Of Efficacy and Safety of Cannabidiol in Idiopathic and Diabetic Gastroparesis. Clin Gastroenterol Hepatol. 2023 Jul 21:S1542-3565(23)00543-8. doi: 10.1016/j.cgh.2023.07.008. Epub ahead of print. PMID: 37482172.
Camilleri M, Zheng T. Cannabinoids and the GI Tract. Clin Gastroenterol Hepatol. 2023 Sep 5:S1542-3565(23)00668-7. doi: 10.1016/j.cgh.2023.07.031. Epub ahead of print. PMID: 37678488
Camilleri M, Zheng T, Vosoughi K, Lupianez-Merly C, Eckert D, Busciglio I, Burton D, Dilmaghani S. Optimal measurement of gastric emptying of solids in gastroparesis or functional dyspepsia: evidence to establish standard test. Gut. 2023 Sep 19:gutjnl-2023-330733. doi: 10.1136/gutjnl-2023-330733. Epub ahead of print. PMID: 37726164
Zheng T, BouSaba J, Camilleri M, et al, Effect of rapid colonic transit on stool microbiome and short-chain fatty acids in diarrhoea-predominant irritable bowel syndrome. GUT. 2023 Jan 19:gutjnl-2022-329359. doi: 10.1136/gutjnl-2022-329359. Epub ahead of print. PMID: 36657960.
Zheng T, Camilleri M. Management of Gastroparesis. Gastroenterol Hepatol (N Y). 2021 Nov;17(11):515-525. PMID: 35466306; PMCID: PMC9021159