NPI Portal NPI Lookup & Verification

Gary Sisson, O.D.

Gary Sisson is a Optometrist provider (Optometrist) practicing in Bonham, TX, registered in the NPPES registry with NPI 1770537383 since 2006. The credential OD stands for Doctor of Optometry.

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NPI 1770537383
Entity type Individual (Type 1)
Name Gary Sisson
Credential O.D.
Sex Male
Practice address 1201 E 9TH ST, Bonham, TX, 75418
Phone 9035832111
Fax 9035836639
Enumeration date 2006-05-19
Last updated in NPPES 2010-09-14

Taxonomy & licenses

Taxonomy code Specialty Primary License State
152W00000X Optometrist Primary 3219T TX

OD — Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Copy-ready billing details
Provider: Gary Sisson, O.D.
NPI: 1770537383
Taxonomy: 152W00000X (Optometrist)
Address: 1201 E 9TH ST, Bonham, TX, 75418

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1760421945 Lenora Sanders Individual Social Worker Bonham, TX

Verify this record

Cross-check NPI 1770537383 against the authoritative CMS record: view Gary Sisson 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 Gary Sisson?
Gary Sisson is registered in NPPES with the primary taxonomy of Optometrist. 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 2010-09-14.