Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mary Chen MD Inc

Organization Internal Medicine Physician · NPI 1366591174

Mary Chen MD Inc is an Internal Medicine Physician in Walnut, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

18780 Amar Rd Ste 107
Walnut, CA 91789-4560
Phone: (626) 810-6777
Fax: (626) 810-6687
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A78207 (CA)

Record details

NPI number1366591174
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mary Chen — President · (626) 810-6777
NPI enumeratedJanuary 10, 2007
Last updated in NPPESApril 23, 2020
Certification dateApril 23, 2020
Mailing address18780 Amar Rd, Suite 107, Walnut, CA 91789-4560

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