Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Great River Endodontics, PA

Endodontics in Willmar, MN · enumerated 2012 · authorized official Thomas Karn, Owner/President.

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

National Provider Identifier

1144583527

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Registry record

Entity type Organization (Type 2)

Legal business name Great River Endodontics, PA

Practice address 1100 19th Ave Sw, Willmar, MN, 56201

Phone (320) 259-5078

Fax (320) 259-5078

Enumeration date Jun 20, 2012

Last updated in NPPES Jun 20, 2012

Taxonomy & classification

1223E0200X Endodontics Dental Providers · License 11880 (MN) Primary

Authorized official

Name Thomas Karn

Title Owner/President

Phone (320) 259-5078

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 current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2012-06-20. Verify at npiregistry.cms.hhs.gov.

Where is Great River Endodontics, PA located?

The practice location on file with NPPES is in Willmar, MN.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-20.