Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gary C Simpson, OD

Optometrist in Tucson, AZ · enumerated 2007.

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

National Provider Identifier

1922143742

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Registry record

Entity type Individual (Type 1)

Name Gary C Simpson

Credential OD

Sex Male

Practice address 6121 N Paseo Valdear, Tucson, AZ, 85750

Phone (520) 795-7840

Fax (520) 298-0847

Enumeration date Feb 20, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 219 (AZ) 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

How do I verify Gary Simpson's NPI record?

Cross-check NPI 1922143742 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1922143742 active?

Yes, as of the latest NPPES snapshot, NPI 1922143742 is active (record last updated 2007-07-08).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.