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Dr. Ian Chang, D.O.

Rheumatology Physician in Orange, CA · enumerated 2012.

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

National Provider Identifier

1407116411

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Registry record

Entity type Individual (Type 1)
Name Dr. Ian Chang
Credential D.O.
Sex Male
Practice address 101 the City Dr S Bldg 30, Orange, CA, 92868
Phone (714) 456-7720
Enumeration date May 23, 2012
Last updated in NPPES Mar 29, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 5101019682 (MI) Secondary
207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License 20A16850 (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

Where does Ian Chang practice?
The practice location on file with NPPES is in Orange, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Ian Chang?
The National Provider Identifier (NPI) for Ian Chang is 1407116411, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-29.