Siyan Cao, MD, PhD

Specializes In
  • Gastroenterology
Referral Type

Physician Referral Required

Languages Spoken
  • Chinese
  • English


Sees Patients For

Screening colonoscopy, upper endoscopy, microscopic colitis, gastrointestinal bleeding, general gastroenterology

Hospital Affiliations

  • Barnes-Jewish Hospital
  • Barnes-Jewish West County Hospital



Academic Title(s)

Instructor, Medicine
Division of Gastroenterology

Research Interests

Inflammatory bowel disease, mucosal immunology, cellular stress response, gut microbiome


Fellowship: Gastroenterology

2022 Washington University School of Medicine, St. Louis, MO

Residency: Internal Medicine

2019 University of California San Francisco, San Francisco, CA

Medical Degree

2016 Columbia University, New York, NY

PhD: Biochemistry

2013 University of Michigan Ann Arbor, Ann Arbor, MI