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Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Dr. Greg Hansen, P.C.

Optometrist in Dubuque, IA · enumerated 2007 · authorized official Greg Hansen, President.

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

National Provider Identifier

1235266628

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Registry record

Entity type Organization (Type 2)
Legal business name Dr. Greg Hansen, P.C.
Practice address 4200 Dodge St, Dubuque, IA, 52003
Phone (563) 582-3173
Enumeration date Feb 27, 2007
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License 1941 AND 2010 (IA) Primary

Authorized official

Name Greg Hansen
Title President
Phone (563) 582-3173

Other identifiers

Identifier Type State Issuer
1487616736 Other IA NPI FOR GREG

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 is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Dr. Greg Hansen, P.C.?
Dr. Greg Hansen, P.C. is registered in NPPES as a Optometrist (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.