Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John J Walker Jr., PT

Q: What is the NPI number for John Walker?

The National Provider Identifier (NPI) for John Walker is 1720184435, a Type 1 (individual) record in the CMS NPPES registry.

Physical Therapist in Princeton, NJ · enumerated 2006.

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

National Provider Identifier

1720184435

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Registry record

Entity type Individual (Type 1)

Name John J Walker Jr.

Credential PT

Sex Male

Practice address 325 Princeton Ave, Princeton, NJ, 08540

Phone (609) 924-8131

Fax (609) 683-7559

Enumeration date Sep 16, 2006

Last updated in NPPES Jan 24, 2021

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 40QA00459800 (NJ) 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

Where does John Walker practice?

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

What is the NPI number for John Walker?

The National Provider Identifier (NPI) for John Walker is 1720184435, 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 2021-01-24.