Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Matthew Calvin Larson, ATC, CSCS

Athletic Trainer in Duluth, MN · enumerated 2006.

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

National Provider Identifier

1396767794

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Registry record

Entity type Individual (Type 1)

Name Mr. Matthew Calvin Larson

Credential ATC, CSCS

Sex Male

Practice address 400 E 3rd St, Duluth, MN, 55805

Phone (218) 786-3050

Fax (218) 720-3415

Enumeration date Jul 24, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2255A2300X Athletic Trainer Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License TEMP. PERMIT # 1197 (MN) 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

What specialty is Matthew Larson?

Matthew Larson 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.

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 2007-07-08.