Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

JOHN HOWARD MARTIN
NPI 1477466423
Prosthetic/Orthotic Supplier in Walnut Creek, CA

Q: What is John Martin's NPI number?

The NPI number for John Martin is 1477466423. It was assigned to this individual provider in the NPPES registry on September 22, 2026.

Q: What is John Martin's specialty?

The primary specialty registered for this NPI is Prosthetic/Orthotic Supplier with taxonomy code 335E00000X.

Q: When was this NPI record last updated?

The NPPES record for John Martin was last updated on September 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since September 22, 2026

925 YGNACIO VALLEY RD STE 106, WALNUT CREEK, CA 94596(510) 677-9359 Get Directions Write a Review

NPPES record added: September 22, 2026. Verified against the NPPES registry weekly; last sync: September 27, 2026.

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About John Howard Martin NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN HOWARD MARTIN (NPI 1477466423) is an individual prosthetic/orthotic supplier provider in Walnut Creek, California and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1477466423

Entity TypeIndividualMale

Primary Taxonomy335E00000X

Provider Legal NameJOHN HOWARD MARTIN

Location Address925 YGNACIO VALLEY RD STE 106Walnut Creek, CA 94596-3924

Mailing Address61 Eagle Lake Ln Unit 13San Ramon, CA 94582-4859 · (510) 677-9359

Phone(510) 677-9359

Sole ProprietorYes

Enumeration DateSeptember 22, 2026

NPPES CertifiedSeptember 22, 2026

✔ NPI 1477466423 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyProsthetic/Orthotic SupplierSuppliers

Taxonomy Code335E00000X

Definition

An organization that provides prosthetic and orthotic care which may include, but is not limited to, patient evaluation, prosthesis or orthosis design, fabrication, fitting and modification to treat limb loss for purposes of restoring physiological function and/or cosmesis or to treat a neuromusculoskeletal disorder or acquired condition.

925 YGNACIO VALLEY RD STE 106, Walnut Creek, CA 94596

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Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MICHELLE MARIE MARTIN

Prosthetic/Orthotic Supplier

925 YGNACIO VALLEY RD STE 106
WALNUT CREEK, CA 94596

Contra Costa County (925) 287-1100

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Martin's NPI number?

The NPI number for John Martin is 1477466423. It was assigned to this individual provider in the NPPES registry on September 22, 2026.

Where is John Martin located?

John Martin practices at 925 Ygnacio Valley Rd Ste 106, Walnut Creek, CA 94596. The listed phone number is (510) 677-9359.

What is John Martin's specialty?

The primary specialty registered for this NPI is Prosthetic/Orthotic Supplier with taxonomy code 335E00000X.

When was this NPI record last updated?

The NPPES record for John Martin was last updated on September 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.