Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gary Sisson, O.D.

Optometrist in Bonham, TX · enumerated 2006.

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

National Provider Identifier

1770537383

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Registry record

Entity type Individual (Type 1)

Name Gary Sisson

Credential O.D.

Sex Male

Practice address 1201 E 9th St, Bonham, TX, 75418

Phone (903) 583-2111

Fax (903) 583-6639

Enumeration date May 19, 2006

Last updated in NPPES Sep 14, 2010

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 3219T (TX) Primary

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-09-14.