Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory P Zadow, D.P.T.

Physical Therapist in Sisters, OR · enumerated 2005.

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

National Provider Identifier

1255339735

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory P Zadow

Credential D.P.T.

Sex Male

Practice address 325 N Locust St, Sisters, OR, 97759

Phone (541) 549-3534

Fax (541) 549-1272

Enumeration date Jul 8, 2005

Last updated in NPPES Sep 11, 2023

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 4090 (OR) 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

Where does Gregory Zadow practice?

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

What is the NPI number for Gregory Zadow?

The National Provider Identifier (NPI) for Gregory Zadow is 1255339735, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-11.