Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Radiology Subspecialists of Northern Illinois, LLC

Diagnostic Radiology Physician in Geneva, IL · enumerated 2016 · authorized official Diane Sarka, Credentialing Specialist.

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

National Provider Identifier

1104378942

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Registry record

Entity type Organization (Type 2)

Legal business name Radiology Subspecialists of Northern Illinois, LLC

Practice address 825 W State St, Suite 103e, Geneva, IL, 60134

Phone (630) 208-4412

Enumeration date Oct 27, 2016

Last updated in NPPES Oct 27, 2016

Taxonomy & classification

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians Primary

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

Authorized official

Name Diane Sarka

Title Credentialing Specialist

Phone (630) 928-5234

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 the NPI number for Radiology Subspecialists of Northern Illinois, LLC?

The NPI for Radiology Subspecialists of Northern Illinois, LLC is 1104378942, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Radiology Subspecialists of Northern Illinois, LLC?

NPPES lists Diane Sarka (Credentialing Specialist) 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 2016-10-27.