NPI Portal NPI Lookup & Verification

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

Sarah E Duffy

Physical Therapist in Madison, WI · enumerated 2006 · practices at University of Wisconsin Hospitals and Clinics Authority.

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

National Provider Identifier

1598786162

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Registry record

Entity type Individual (Type 1)
Name Sarah E Duffy
Sex Female
Practice address Madison, WI, 53718
Phone (608) 440-6440
Fax (608) 662-4541
Enumeration date Jul 21, 2006
Last updated in NPPES Apr 30, 2021

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

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 10172-024 (WI) Primary

Other identifiers

Identifier Type State Issuer
10172-024 Other WI PT

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Sarah Duffy?
The National Provider Identifier (NPI) for Sarah Duffy is 1598786162, a Type 1 (individual) record in the CMS NPPES registry.
Where does Sarah Duffy practice?
The practice location on file with NPPES is in Madison, WI. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-30.