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

Daniel Leonard, ATC

Athletic Trainer in Stony Brook, NY · enumerated 2017.

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

National Provider Identifier

1831623438

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Registry record

Entity type Individual (Type 1)

Name Daniel Leonard

Credential ATC

Sex Male

Practice address Stony Brook, NY, 11794

Phone (631) 632-7709

Enumeration date Apr 20, 2017

Last updated in NPPES Apr 20, 2017

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 003378-1 (NY) 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

What is the NPI number for Daniel Leonard?

The National Provider Identifier (NPI) for Daniel Leonard is 1831623438, a Type 1 (individual) record in the CMS NPPES registry.

Where does Daniel Leonard practice?

The practice location on file with NPPES is in Stony Brook, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-04-20.