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

Dr. William George Oswald III, DPT

Physical Therapist in Great Neck, NY · enumerated 2007.

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

National Provider Identifier

1538352372

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Registry record

Entity type Individual (Type 1)

Name Dr. William George Oswald III

Credential DPT

Sex Male

Practice address Great Neck, NY, 11021

Phone (516) 650-1724

Enumeration date Aug 24, 2007

Last updated in NPPES Nov 4, 2013

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 024425 (NY) Primary

DPT · Doctor of Physical Therapy: A physical therapist holding the clinical doctorate now standard for the profession. About the DPT 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

What is the NPI number for William Oswald?

The National Provider Identifier (NPI) for William Oswald is 1538352372, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Oswald practice?

The practice location on file with NPPES is in Great Neck, 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 2013-11-04.