Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. ARNOLD CHANG
NPI 1790453405
Pharmacist - Psychiatric in Fullerton, CA

Q: What is Arnold Chang's NPI number?

The NPI number for Arnold Chang is 1790453405. It was assigned to this individual provider in the NPPES registry on August 30, 2021.

Q: What is Arnold Chang's specialty?

The primary specialty registered for this NPI is Pharmacist, specializing in Psychiatric, with taxonomy code 1835P1300X.

Q: When was this NPI record last updated?

The NPPES record for Arnold Chang was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 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 August 30, 2021

600 RODEO RD, FULLERTON, CA 92835(714) 747-7677 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Mr. Arnold Chang NPPES

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

MR. ARNOLD CHANG (NPI 1790453405) is an individual psychiatric provider in Fullerton, California, licensed in California (91108) and active in the NPI registry since August 2021.

NPPES Registry Identity

NPI1790453405

Entity TypeIndividualMale

Primary Taxonomy1835P1300X

Provider Legal NameMR. ARNOLD CHANG

Location Address600 RODEO RDFullerton, CA 92835-4051

Mailing Address600 Rodeo RdFullerton, CA 92835-4051 · (714) 747-7677

Phone(714) 747-7677

Sole ProprietorYes

Enumeration DateAugust 30, 2021

Last NPPES UpdateJuly 13, 2026

NPPES CertifiedJuly 13, 2026

✔ NPI 1790453405 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPharmacist · PsychiatricPharmacy Service Providers

Taxonomy Code1835P1300X

License✔ Licensed in CA · 91108

Definition

A licensed pharmacist who has demonstrated specialized knowledge and skill in optimizing care of patients with psychiatric illness by assessing and monitoring patients, recognizing drug-induced problems, and recommending appropriate treatment plans.

600 RODEO RD, Fullerton, CA 92835

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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 Arnold Chang's NPI number?

The NPI number for Arnold Chang is 1790453405. It was assigned to this individual provider in the NPPES registry on August 30, 2021.

Where is Arnold Chang located?

Arnold Chang practices at 600 Rodeo Rd, Fullerton, CA 92835. The listed phone number is (714) 747-7677.

What is Arnold Chang's specialty?

The primary specialty registered for this NPI is Pharmacist, specializing in Psychiatric, with taxonomy code 1835P1300X.

When was this NPI record last updated?

The NPPES record for Arnold Chang was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 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.