Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Regional Diagnostics, LLC

Radiology Clinic/Center in Chicago, IL · enumerated 2005 · authorized official Ron Clark, C.F.O..

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

National Provider Identifier

1053309377

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Registry record

Entity type Organization (Type 2)

Legal business name Regional Diagnostics, LLC

Practice address 4351 N Cicero Ave, Chicago, IL, 60641

Phone (773) 427-1222

Fax (773) 427-1333

Enumeration date Oct 11, 2005

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

261QR0200X Radiology Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Ron Clark

Title C.F.O.

Phone (216) 464-8484

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 2020-08-22. Verify at npiregistry.cms.hhs.gov.

Where is Regional Diagnostics, LLC located?

The practice location on file with NPPES is in Chicago, IL.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.