NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Chiangyuan Chuck Liau, M.D..

Dermatology Physician in Brea, CA · enumerated 2006.

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

National Provider Identifier

1891721171

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Chiangyuan Chuck Liau
Credential M.D..
Sex Male
Practice address Brea, CA, 92821
Phone (714) 529-6842
Fax (714) 256-1728
Enumeration date Jun 25, 2006
Last updated in NPPES Sep 12, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License A31031 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
00A310310 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

Where does Chiangyuan Liau practice?
The practice location on file with NPPES is in Brea, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Chiangyuan Liau?
The National Provider Identifier (NPI) for Chiangyuan Liau is 1891721171, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-12.