Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Riverside Radiology Medical Group, Inc.

Vascular & Interventional Radiology Physician in Riverside, CA · enumerated 2009 · authorized official Donald Massee, President.

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

National Provider Identifier

1790911964

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Registry record

Entity type Organization (Type 2)

Legal business name Riverside Radiology Medical Group, Inc.

Practice address 4440 Brockton Ave, Suite 100, Riverside, CA, 92501

Phone (951) 781-2277

Fax (951) 781-2293

Enumeration date Jun 2, 2009

Last updated in NPPES Jun 2, 2009

Taxonomy & classification

2085R0204X Vascular & Interventional Radiology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Donald Massee

Title President

Phone (951) 781-2277

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.

Read the full guide → Validate an NPI →

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 Riverside Radiology Medical Group, Inc.?

Riverside Radiology Medical Group, Inc. is registered in NPPES as a Vascular & Interventional Radiology Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-06-02.