NPI Portal NPI Lookup & Verification

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

Thomas Lin, D.D.S.

Endodontics in Alhambra, CA · enumerated 2016 · practices at Dr. Lin. DDS, Inc..

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1609228527

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Registry record

Entity type Individual (Type 1)
Name Thomas Lin
Credential D.D.S.
Sex Male
Practice address Alhambra, CA, 91803
Phone (626) 457-5757
Enumeration date Jul 2, 2016
Last updated in NPPES Jul 26, 2022

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

Taxonomy & licenses

122300000X Dentist Dental Providers · License 100323 (CA) Secondary
1223G0001X General Practice Dentistry Dental Providers · License 100323 (CA) Secondary
1223E0200X Endodontics Dental Providers · License 100323 (CA) Primary
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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 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 Thomas Lin?
Thomas Lin is registered in NPPES with the primary taxonomy of Endodontics. 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 2026-07-11. Provider record last updated 2022-07-26.