Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Tamuyen Nguyen, M.D.

Dermatology Physician in Upland, CA · enumerated 2006.

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

National Provider Identifier

1710041686

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Registry record

Entity type Individual (Type 1)

Name Tamuyen Nguyen

Credential M.D.

Sex Female

Practice address 1310 San Bernardino Rd, Suite 207, Upland, CA, 91786

Phone (909) 946-8600

Fax (909) 946-8604

Enumeration date Dec 21, 2006

Last updated in NPPES Aug 8, 2011

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License A80098 (CA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Tamuyen Nguyen?

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

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.

Other providers at this practice address

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Jeffrey Ries Specialist · Upland, CA NPI 1780647735 Franklin Johnson Obstetrics Physician · Upland, CA NPI 1780632299 Tan Nguyen Procedural Dermatology Physician · Upland, CA NPI 1144273491 Monica Valenzuela-Gamm Obstetrics & Gynecology Physician · Upland, CA NPI 1477575694 Mouhanad Alwan Obstetrics & Gynecology Physician · Upland, CA NPI 1760595029 Basim Abdelkarim Gastroenterology Physician · Upland, CA NPI 1932217544 Toni Vu Obstetrics & Gynecology Physician · Upland, CA NPI 1851402358 Yumiko Wong Physician Assistant · Upland, CA NPI 1730243551

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-08.