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

Sean M Duffy, ATC

Athletic Trainer in Aberdeen, SD · enumerated 2010 · practices at Northern State University.

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

National Provider Identifier

1790017192

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Registry record

Entity type Individual (Type 1)
Name Sean M Duffy
Credential ATC
Sex Male
Practice address Aberdeen, SD, 57401
Phone (605) 626-7733
Enumeration date Feb 10, 2010
Last updated in NPPES Feb 10, 2010

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

Taxonomy & licenses

2255A2300X Athletic Trainer Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 0269 (SD) 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 is the NPI number for Sean Duffy?
The National Provider Identifier (NPI) for Sean Duffy is 1790017192, a Type 1 (individual) record in the CMS NPPES registry.
Where does Sean Duffy practice?
The practice location on file with NPPES is in Aberdeen, SD. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-10.