Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Linda Duffy, RPT

Physical Therapist in Wareham, MA · enumerated 2018.

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

National Provider Identifier

1689155517

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Registry record

Entity type Individual (Type 1)

Name Mrs. Linda Duffy

Credential RPT

Sex Female

Practice address 50 Indian Neck Rd, Wareham, MA, 02571

Phone (508) 296-6264

Fax (508) 295-3484

Enumeration date Aug 28, 2018

Last updated in NPPES Aug 28, 2018

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 11579 (MA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1689155517 active?

Yes, as of the latest NPPES snapshot, NPI 1689155517 is active (record last updated 2018-08-28).

How do I verify Linda Duffy's NPI record?

Cross-check NPI 1689155517 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-28.