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John Christian Ong, DO

Nephrology Physician in Fountain Valley, CA · enumerated 2018.

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

National Provider Identifier

1477056406

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Registry record

Entity type Individual (Type 1)
Name John Christian Ong
Credential DO
Sex Male
Practice address 11100 Warner Ave Ste 218, Fountain Valley, CA, 92708
Phone (714) 641-9696
Fax (714) 641-1211
Enumeration date Mar 15, 2018
Last updated in NPPES Jan 16, 2026

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 20A21125 (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 Ong's NPI record?
Cross-check NPI 1477056406 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1477056406 active?
Yes, as of the latest NPPES snapshot, NPI 1477056406 is active (record last updated 2026-01-16).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-16.