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Mrs. John C Koumas, D.O.

Family Medicine Physician in West Covina, CA · enumerated 2005 · practices at Citrus Valley Physician Partners.

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

National Provider Identifier

1134111958

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Registry record

Entity type Individual (Type 1)
Name Mrs. John C Koumas
Credential D.O.
Sex Male
Practice address 1135 S Sunset Ave Ste 200, West Covina, CA, 91790
Phone (626) 732-8390
Enumeration date Aug 17, 2005
Last updated in NPPES Feb 1, 2024

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 20A5515 (CA) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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 John Koumas's NPI record?
Cross-check NPI 1134111958 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1134111958 active?
Yes, as of the latest NPPES snapshot, NPI 1134111958 is active (record last updated 2024-02-01).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-01.