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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. An L Nguyen, M.D.

Allergy & Immunology Physician in Houston, TX · enumerated 2012 · practices at Vital Allergy and Asthma Center.

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

National Provider Identifier

1841559283

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Registry record

Entity type Individual (Type 1)
Name Dr. An L Nguyen
Credential M.D.
Sex Female
Practice address 1213 Hermann Dr Ste 550, Houston, TX, 77004
Phone (713) 820-6380
Fax (713) 820-6377
Enumeration date May 4, 2012
Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License Q2691 (TX) 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.

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Frequently asked questions

Is NPI 1841559283 active?
Yes, as of the latest NPPES snapshot, NPI 1841559283 is active (record last updated 2023-03-07).
How do I verify An Nguyen's NPI record?
Cross-check NPI 1841559283 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 2023-03-07.