Winona TanM.D.

Obstetrics & Gynecology·Palo Alto, CA

Winona Tan, M.D. is an Obstetrics & Gynecology provider in Palo Alto, CA, as of July 2026.

NPI1003904350
Registered2006
Class of1993

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Education

University of California, San Francisco School of MedicineMedical school · Graduated 1993

Education on record as of August 2026.

Winona Tan at a glance

Provider: Winona Tan
Credential: M.D.
Specialty: Obstetrics/Gynecology
Procedures: Obstetrics & Gynecology CPT codes
Location: Palo Alto, CA
Medical school: University of California, San Francisco School of Medicine
Graduated: 1993
NPI registered: 2006
NPI: 1003904350
Snapshot: July 2026

Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.

Questions

Where does Winona Tan practice?

Winona Tan, M.D. is based in Palo Alto, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.

What is Winona Tan's NPI number?

Winona Tan's National Provider Identifier (NPI) is 1003904350, registered in 2006. Specialty on record: Obstetrics/Gynecology; credential M.D.

Where did Winona Tan go to medical school?

Winona Tan, M.D. attended University of California, San Francisco School of Medicine, graduating in 1993.

How many Obstetrics & Gynecology providers in California work at ambulatory surgery centers?

544 Obstetrics & Gynecology surgeons and proceduralists in California are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Winona Tan among them. The California Obstetrics & Gynecology directory lists each one by city with credential, NPI, and center affiliations.

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