RIVERSIDE RADIOLOGY MEDICAL GROUP INC
NPI 1699776526
Radiology - Diagnostic Radiology in Riverside, CA
About Riverside Radiology Medical Group Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RIVERSIDE RADIOLOGY MEDICAL GROUP INC (NPI 1699776526) is a healthcare organization registered as a diagnostic radiology in Riverside, California and active in the NPI registry since August 2005. The organization lists Donal R. Massee, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Riverside Radiology Medical Group Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
84Medicare enrollment records show 84 clinicians reassign Medicare billing to Riverside Radiology Medical Group Inc, which bills Medicare for the services they deliver. Of these, 6 practice at this address and 10 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 3
Nearest to this location (20)
See all 84Loma Linda, CA 92354
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Riverside Radiology Medical Group Inc's NPI number?
The NPI number for Riverside Radiology Medical Group Inc is 1699776526. It was assigned to this organization in the NPPES registry on August 2, 2005.
Where is Riverside Radiology Medical Group Inc located?
Riverside Radiology Medical Group Inc is located at 4445 Magnolia Ave, Riverside, CA 92501. The listed phone number is (951) 788-3400.
What is Riverside Radiology Medical Group Inc's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Riverside Radiology Medical Group Inc enrolled in Medicare?
Yes. Riverside Radiology Medical Group Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Riverside Radiology Medical Group Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 84 clinicians in 3 Medicare specialties reassign their Medicare billing to Riverside Radiology Medical Group Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Diagnostic Radiology (79), Interventional Radiology (4) and Nuclear Medicine (1). Of these, 6 practice at this address and 10 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Riverside Radiology Medical Group Inc was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Riverside Radiology Medical Group Inc · NPI 1699776526
Diagnostic Radiology organization in Riverside, California. Organization record, active in the CMS NPPES registry since August 2, 2005.
## Identity
- **NPI:** 1699776526 (Entity type: Organization)
- **Enumerated:** August 2, 2005
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **Organization subpart:** No
- **Authorized official:** Donal Massee, PRESIDENT
## Practice location
- **Address:** 4445 MAGNOLIA AVE, Riverside, CA 92501-4135
- **Phone:** (951) 788-3400 · **Fax:** (951) 788-3194
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 84 clinicians in 3 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Diagnostic Radiology (79), Interventional Radiology (4), Nuclear Medicine (1); 6 practice at this address and 10 within 10 miles; [full list](https://npiprofile.com/npi/1699776526/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 21, 2022
- **Other identifiers:** Medicaid GR0104280 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1699776526) · Data from the CMS NPPES public registry.