Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thao Nguyen Allen, PA-C

Physician Assistant in Reston, VA · enumerated 2010.

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

National Provider Identifier

1063734713

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Registry record

Entity type Individual (Type 1)

Name Thao Nguyen Allen

Credential PA-C

Sex Female

Practice address 1831 Wiehle Ave, Suite 200, Reston, VA, 20190

Phone (703) 709-1114

Fax (703) 709-6516

Enumeration date Feb 23, 2010

Last updated in NPPES Jun 11, 2013

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 0110003232 (VA) Primary

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Thao Allen?

Thao Allen is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-11.