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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Helen C Koo, M.D.

Pediatrics Physician in Montebello, CA · enumerated 2006 · practices at A&K Pharmacy Inc..

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

National Provider Identifier

1477596864

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Registry record

Entity type Individual (Type 1)
Name Dr. Helen C Koo
Credential M.D.
Sex Female
Practice address Montebello, CA, 90640
Phone (323) 721-4922
Fax (323) 721-3484
Enumeration date Jun 13, 2006
Last updated in NPPES Apr 18, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 00A267560 (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
EIN 953772927 Other - FEDERAL EMPLOYER ID NO.
00A267560 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 Helen Koo?
The National Provider Identifier (NPI) for Helen Koo is 1477596864, a Type 1 (individual) record in the CMS NPPES registry.
Where does Helen Koo practice?
The practice location on file with NPPES is in Montebello, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-18.