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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Joseph Foster Jahner, OD

Optometrist in Grinnell, IA · enumerated 2020 · practices at Jensen Optometrists, P.L.L.C..

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

National Provider Identifier

1285245274

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Registry record

Entity type Individual (Type 1)
Name Joseph Foster Jahner
Credential OD
Sex Male
Practice address Grinnell, IA, 50112
Phone (641) 891-7263
Enumeration date Aug 12, 2020
Last updated in NPPES Aug 12, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 101219 (IA) 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

How do I verify Joseph Jahner's NPI record?
Cross-check NPI 1285245274 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1285245274 active?
Yes, as of the latest NPPES snapshot, NPI 1285245274 is active (record last updated 2020-08-12).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-12.