Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Blair Gerratt, OD

Optometrist in Billings, MT · enumerated 2019.

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

National Provider Identifier

1346809423

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Registry record

Entity type Individual (Type 1)

Name Blair Gerratt

Credential OD

Sex Male

Practice address 111 S 24th St W, Billings, MT, 59102

Phone (406) 651-9063

Enumeration date Jun 11, 2019

Last updated in NPPES Jun 11, 2019

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OPT-OPT-LIC-3558 (MT) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Blair Gerratt practice?

The practice location on file with NPPES is in Billings, MT. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Blair Gerratt?

The National Provider Identifier (NPI) for Blair Gerratt is 1346809423, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-06-11.