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Jonathan D Ou MD Inc

Internal Medicine Physician in Chino, CA · enumerated 2013 · authorized official Jonathan Ou, President.

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

National Provider Identifier

1497199772

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Registry record

Entity type Organization (Type 2)
Legal business name Jonathan D Ou MD Inc
Practice address 5562 Philadelphia St Ste 311, Chino, CA, 91710
Phone (909) 465-6342
Fax (855) 830-1723
Enumeration date Apr 17, 2013
Last updated in NPPES Aug 18, 2026

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A113176 (CA) Primary
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License A113176 (CA) Secondary

Authorized official

Name Jonathan Ou
Title President
Phone (909) 465-6342

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 a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Jonathan D Ou MD Inc?
Jonathan D Ou MD Inc is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-08-18.