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Mary Chen MD Inc

Internal Medicine Physician in Walnut, CA · enumerated 2007 · authorized official Mary Chen, President.

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

National Provider Identifier

1366591174

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Registry record

Entity type Organization (Type 2)
Legal business name Mary Chen MD Inc
Practice address 18780 Amar Rd, Suite 107, Walnut, CA, 91789
Phone (626) 810-6777
Fax (626) 810-6687
Enumeration date Jan 10, 2007
Last updated in NPPES Apr 23, 2020

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A78207 (CA) Primary

Authorized official

Name Mary Chen
Title President
Phone (626) 810-6777

Other identifiers

Identifier Type State Issuer
00A782070 Medicaid CA -

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

What is the NPI number for Mary Chen MD Inc?
The NPI for Mary Chen MD Inc is 1366591174, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Mary Chen MD Inc?
NPPES lists Mary Chen (President) as the authorized official for this organization.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-04-23.