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123 Medical Group Corp.

Family Medicine Physician in Walnut, CA · enumerated 2015 · authorized official Allan Chang, President.

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

National Provider Identifier

1588029771

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Registry record

Entity type Organization (Type 2)
Legal business name 123 Medical Group Corp.
Practice address 18800 Amar Rd Ste C12, Walnut, CA, 91789
Phone (626) 788-9691
Fax (626) 608-0318
Enumeration date Dec 15, 2015
Last updated in NPPES Aug 9, 2022

Taxonomy & classification

171100000X Acupuncturist Other Service Providers Secondary
207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Primary
207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Allan Chang
Title President
Phone (626) 889-6917

Other identifiers

Identifier Type State Issuer
1588029771 Other — FAMILY MEDICINE

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.

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Frequently asked questions

Who is the authorized official for 123 Medical Group Corp.?
NPPES lists Allan Chang (President) as the authorized official for this organization.
What is the NPI number for 123 Medical Group Corp.?
The NPI for 123 Medical Group Corp. is 1588029771, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-09.