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Helen K Chen, MD

Radiation Oncology Physician in South Pasadena, CA · enumerated 2005 · practices at City of Hope Medical Foundation.

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

National Provider Identifier

1578546388

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Registry record

Entity type Individual (Type 1)
Name Helen K Chen
Credential MD
Sex Female
Practice address 209 Fair Oaks Ave, South Pasadena, CA, 91030
Phone (626) 396-2900
Fax (626) 799-2889
Enumeration date Nov 25, 2005
Last updated in NPPES Nov 23, 2020

Taxonomy & licenses

174400000X Specialist Other Service Providers · License G70470 (CA) Secondary
2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License G70470 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
00G704700 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

How do I verify Helen Chen's NPI record?
Cross-check NPI 1578546388 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1578546388 active?
Yes, as of the latest NPPES snapshot, NPI 1578546388 is active (record last updated 2020-11-23).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-23.