Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Nguyen Duong, PHARMD

Pharmacist in Laguna Woods, CA · enumerated 2011.

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

National Provider Identifier

1134412661

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Registry record

Entity type Individual (Type 1)

Name William Nguyen Duong

Credential PHARMD

Sex Male

Practice address 24330 El Toro Rd, Laguna Woods, CA, 92637

Phone (949) 830-0391

Fax (949) 830-1141

Enumeration date May 17, 2011

Last updated in NPPES May 17, 2011

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 64794 (CA) Primary

PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD 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 1134412661 active?

Yes, as of the latest NPPES snapshot, NPI 1134412661 is active (record last updated 2011-05-17).

How do I verify William Duong's NPI record?

Cross-check NPI 1134412661 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 2011-05-17.