Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Phillip T. Hsu, M.D.

Dermatology Physician in Fontana, CA · enumerated 2006.

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

National Provider Identifier

1366400574

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Registry record

Entity type Individual (Type 1)

Name Phillip T. Hsu

Credential M.D.

Sex Male

Practice address 9985 Sierra Ave, Department of Dermatology, Fontana, CA, 92335

Phone (562) 293-7880

Enumeration date May 4, 2006

Last updated in NPPES Dec 1, 2021

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care · License 50445 (WI) Secondary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 1555 (WI) 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

How do I verify Phillip Hsu's NPI record?

Cross-check NPI 1366400574 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1366400574 active?

Yes, as of the latest NPPES snapshot, NPI 1366400574 is active (record last updated 2021-12-01).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-01.