Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Riverside Radiology Medical Group, Inc.

Diagnostic Radiology Physician in Riverside, CA · enumerated 2008 · authorized official Donald Massee, Medical Director.

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

National Provider Identifier

1558516179

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Registry record

Entity type Organization (Type 2)

Legal business name Riverside Radiology Medical Group, Inc.

Practice address 1770 Iowa Ave, 280, Riverside, CA, 92507

Phone (951) 801-6348

Fax (951) 786-0460

Enumeration date Nov 24, 2008

Last updated in NPPES Aug 17, 2009

Taxonomy & classification

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Donald Massee

Title Medical Director

Phone (951) 781-2270

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 current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2009-08-17. Verify at npiregistry.cms.hhs.gov.

Where is Riverside Radiology Medical Group, Inc. located?

The practice location on file with NPPES is in Riverside, CA.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-08-17.