NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John J Johnsen, LAT

Athletic Trainer in Oshkosh, WI · enumerated 2005 · practices at University of Wisconsin System Non Payroll.

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

National Provider Identifier

1174512461

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Registry record

Entity type Individual (Type 1)
Name John J Johnsen
Credential LAT
Sex Male
Practice address 800 Algoma Blvd, Oshkosh, WI, 54901
Enumeration date Oct 19, 2005
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2255A2300X Athletic Trainer Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 4939 (WI) Primary

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

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.
What specialty is John Johnsen?
John Johnsen is registered in NPPES with the primary taxonomy of Athletic Trainer. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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