Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joseph Kowalski, OD

Optometrist in Tucson, AZ · enumerated 2018.

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

National Provider Identifier

1194214890

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Registry record

Entity type Individual (Type 1)

Name Joseph Kowalski

Credential OD

Sex Male

Practice address 1502 N Tucson Blvd, Tucson, AZ, 85716

Phone (520) 326-4321

Enumeration date May 8, 2018

Last updated in NPPES Jan 19, 2022

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OPT-OPT-LIC-3095 (MT) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 2241 (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

What specialty is Joseph Kowalski?

Joseph Kowalski 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-19.