Gastroenterology
Siyan Cao, MD
Assistant Professor, Medicine, Division of Gastroenterology
Siyan Cao, MD, PhD, is an Assistant Professor of Medicine in the Division of Gastroenterology at Washington University School of Medicine in St. Louis, Missouri. He specializes in general gastroenterology, treating conditions such as viral gastroenteritis, Crohn's disease, ulcerative colitis, colitis, microscopic colitis, gastrointestinal bleeding, gastrointestinal fistula, familial adenomatous polyposis, hemorrhagic proctocolitis, and gastroesophageal reflux disease. Dr. Cao performs procedures
9+
Years in Practice
Credentials
Board Certifications
- Gastroenterology (American Board of Internal Medicine)
- Internal Medicine (American Board of Internal Medicine)
Education & Training
- Washington University/B-JH/SLCH Consortium — Fellowship, Gastroenterology, 2019 - 2022
- University of California (San Francisco) — Residency, Internal Medicine, 2016 - 2019
- Columbia University Vagelos College of Physicians and Surgeons — M.D., 2016
- University of Michigan Ann Arbor — Ph.D., Biochemistry, 2008 - 2013
Peer Recognition
- American Society for Clinical Investigation — ASCI Young Investigator
2026
Clinical Focus
Subspecialties
Conditions & Treatments
Practice Details
Hospital Affiliations
- Barnes-Jewish Hospital
Languages
English, Chinese (Mandarin)
Experience
9+ years in practice