Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

John J Walker Jr., PT

Individual provider Physical Therapist · NPI 1720184435

John J Walker Jr., PT is registered under Physical Therapist in Private Practice in Princeton, New Jersey. Qualified in 1989, 37 years ago. Practices with Orthonj LLC, a 301-clinician group and accepts Medicare assignment. Licensed in New Jersey.

Years since qualifying
37
Licensed in
NJ
In the registry since
2006
What do these letters mean?
PT — Physical Therapist
A licensed therapist who treats movement, pain and injury.

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Practice location Address checks out

325 Princeton Ave
Princeton, NJ 08540-1617
Phone: (609) 924-8131
Fax: (609) 683-7559
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Physical Therapist (primary) Taxonomy 225100000X · Licence 40QA00459800 (NJ)

Record details

NPI number1720184435
Entity typeIndividual (Type 1)
GenderMale
Credentials PT
Sole proprietorNo
NPI enumeratedSeptember 16, 2006
Last updated in NPPESJanuary 24, 2021
Certification dateJanuary 24, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICAL THERAPIST IN PRIVATE PRACTICE
Medical schoolOTHER
Graduated 1989 (37 years in practice)
Group practice Orthonj Llc — 301 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients104
Services billed 5,783 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Orthonj LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 301 clinicians in the practice; 12 are shown here.

Other providers in Princeton