Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Siyan Cao, MD

Individual provider Internal Medicine Physician · NPI 1417310848

Dr. Siyan Cao, MD is a Gastroenterology in Saint Louis, Missouri. Graduated from Columbia University College of Physicians and Surgeons in 2016, 10 years ago. Practices with Washington University, a 2,986-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
10
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
MO
In the registry since
2016
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1 Barnes Jewish Hospital Plz Div Im Gastroenterology
Saint Louis, MO 63110-1003
Phone: (314) 747-2066
Fax: (314) 362-2357
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 2022010552 (MO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 2022010552 (MO)

Record details

NPI number1417310848
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 2, 2016
Last updated in NPPESApril 15, 2025
Certification dateMarch 1, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 2016 (10 years in practice)
Group practice Washington University — 2986 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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