Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Northshore Radiology Associates of Madison Sc

Diagnostic Radiology Physician in Oconto Falls, WI · enumerated 2006 · authorized official O Arthur Stiennon, President.

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

National Provider Identifier

1881636546

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Registry record

Entity type Organization (Type 2)

Legal business name Northshore Radiology Associates of Madison Sc

Practice address 855 S Main St, Oconto Falls, WI, 54154

Phone (920) 846-3444

Enumeration date Jun 10, 2006

Last updated in NPPES Apr 20, 2008

Taxonomy & classification

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name O Arthur Stiennon

Title President

Phone (920) 846-3444

Other identifiers

Identifier	Type	State	Issuer
32718400	Medicaid	WI	-

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 Northshore Radiology Associates of Madison Sc?

The NPI for Northshore Radiology Associates of Madison Sc is 1881636546, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Northshore Radiology Associates of Madison Sc?

NPPES lists O Arthur Stiennon (President) 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 2008-04-20.