Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David Tseng, D.O.

Internal Medicine Physician in San Leandro, CA · enumerated 2017.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1699200709

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Registry record

Entity type Individual (Type 1)

Name David Tseng

Credential D.O.

Sex Male

Practice address 13855 E 14th St, San Leandro, CA, 94578

Phone (510) 357-6500

Enumeration date Apr 26, 2017

Last updated in NPPES Jun 15, 2021

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 20A17261 (CA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 20A17261 (CA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1699200709 active?

Yes, as of the latest NPPES snapshot, NPI 1699200709 is active (record last updated 2021-06-15).

How do I verify David Tseng's NPI record?

Cross-check NPI 1699200709 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-15.