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

Stephen Tseng, MD

Individual provider Internal Medicine Physician · NPI 1346328077

Stephen Tseng, MD is an Internal Medicine Physician in Ione, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
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

4001 Highway 104
Ione, CA 95640
Phone: (209) 274-4911
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A69139 (CA)
Hospitalist Physician Taxonomy 208M00000X · Licence A69139 (CA)

Record details

NPI number1346328077
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 1, 2006
Last updated in NPPESOctober 24, 2008
Mailing addressPo Box 409099, McSp / Medical Records, Ione, CA 95640-9099

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