NPI Portal NPI Lookup & Verification

Dr. William Thornton Oliver, DDS

Dr. William Thornton Oliver is a General Practice Dentistry provider (Dentist) practicing in Gonzales, TX, registered in the NPPES registry with NPI 1821169293 since 2006. The credential DDS stands for Doctor of Dental Surgery.

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NPI 1821169293
Entity type Individual (Type 1)
Name Dr. William Thornton Oliver
Credential DDS
Sex Male
Practice address 833 ST JOSEPH, Gonzales, TX, 78629
Phone 8306722821
Fax 8306721122
Enumeration date 2006-11-10
Last updated in NPPES 2007-07-08

Taxonomy & licenses

Taxonomy code Specialty Primary License State
1223G0001X General Practice Dentistry Primary 8464 TX

DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Copy-ready billing details
Provider: William Oliver, DDS
NPI: 1821169293
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: 833 ST JOSEPH, Gonzales, TX, 78629

Verify this record

Cross-check NPI 1821169293 against the authoritative CMS record: view Dr. William Thornton Oliver on the official NPPES registry .

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 or validate an NPI number.

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 William Oliver?
William Oliver is registered in NPPES with the primary taxonomy of General Practice Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.