Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Edwin T Tseng, M.D.

Specialist in Thousand Oaks, CA · enumerated 2006.

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

National Provider Identifier

1609897271

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Edwin T Tseng

Credential M.D.

Sex Male

Practice address Thousand Oaks, CA, 91360

Phone (805) 469-8103

Fax (805) 496-9661

Enumeration date Jul 21, 2006

Last updated in NPPES Jan 22, 2009

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

174400000X Specialist Other Service Providers · License A35161 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 1609897271 active?

Yes, as of the latest NPPES snapshot, NPI 1609897271 is active (record last updated 2009-01-22).

How do I verify Edwin Tseng's NPI record?

Cross-check NPI 1609897271 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-01-22.