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Derek Truong Phan MD Inc

Internal Medicine Physician in Westminster, CA · enumerated 2009 · authorized official Derek Phan, Owner.

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

National Provider Identifier

1598091837

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Registry record

Entity type Organization (Type 2)
Legal business name Derek Truong Phan MD Inc
Practice address 9191 Bolsa Ave, Suite 205, Westminster, CA, 92683
Phone (714) 891-7035
Fax (714) 897-8304
Enumeration date Oct 21, 2009
Last updated in NPPES Oct 21, 2009

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A99908 (CA) Primary

Authorized official

Name Derek Phan
Title Owner
Phone (714) 383-1661

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.

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Frequently asked questions

Who is the authorized official for Derek Truong Phan MD Inc?
NPPES lists Derek Phan (Owner) as the authorized official for this organization.
What is the NPI number for Derek Truong Phan MD Inc?
The NPI for Derek Truong Phan MD Inc is 1598091837, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-10-21.