Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Thao P Phung MD Inc

Q: What type of organization is Thao P Phung MD Inc?

Thao P Phung MD Inc is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

Internal Medicine Physician in Fountain Valley, CA · enumerated 2018 · authorized official Thao Phung, President.

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

National Provider Identifier

1043792112

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Registry record

Entity type Organization (Type 2)

Legal business name Thao P Phung MD Inc

Practice address 18035 Brookhurst St, Fountain Valley, CA, 92708

Phone (310) 483-6256

Fax (562) 232-3728

Enumeration date Sep 5, 2018

Last updated in NPPES Aug 31, 2023

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A125932 (CA) Primary

Authorized official

Name Thao Phung

Title President

Phone (310) 483-6256

Other identifiers

Identifier	Type	State	Issuer
A125932	Medicaid	CA	-

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

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Thao P Phung MD Inc?

Thao P Phung MD Inc is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-31.