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Radiant Physician Group

Urgent Care Clinic/Center in Tustin, CA · enumerated 2016 · authorized official Robert Amster, Cmo.

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

National Provider Identifier

1588028666

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Registry record

Entity type Organization (Type 2)
Legal business name Radiant Physician Group
Practice address 18231 Irvine Blvd, Suite 204, Tustin, CA, 92780
Phone (714) 389-5700
Fax (714) 389-6973
Enumeration date Apr 5, 2016
Last updated in NPPES Apr 6, 2016

Taxonomy & classification

261QU0200X Urgent Care Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Robert Amster
Title Cmo
Phone (714) 389-5700

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 Radiant Physician Group?
The NPI for Radiant Physician Group is 1588028666, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Radiant Physician Group?
NPPES lists Robert Amster (Cmo) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-06.