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

Derek Mansfield, PT

Sports Physical Therapist in Dobbs Ferry, NY · enumerated 2016.

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

National Provider Identifier

1831558139

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Registry record

Entity type Individual (Type 1)

Name Derek Mansfield

Credential PT

Sex Male

Practice address Dobbs Ferry, NY, 10522

Phone (914) 222-0876

Fax (347) 713-7748

Enumeration date Feb 15, 2016

Last updated in NPPES Feb 5, 2024

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

Taxonomy & licenses

2251X0800X Orthopedic Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 018-934 (NY) Secondary

2251S0007X Sports Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 018934 (NY) Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT credential

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 1831558139 active?

Yes, as of the latest NPPES snapshot, NPI 1831558139 is active (record last updated 2024-02-05).

How do I verify Derek Mansfield's NPI record?

Cross-check NPI 1831558139 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-05.