Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Radiation Oncology of Wisconsin S C

Radiation Oncology Physician in Mequon, WI · enumerated 2008 · authorized official Carl Olson, Medical Director.

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

National Provider Identifier

1164691986

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Registry record

Entity type Organization (Type 2)

Legal business name Radiation Oncology of Wisconsin S C

Practice address 13111 N Port Washington Rd, Attn: Radiation Oncology Dept., Mequon, WI, 53097

Phone (262) 243-8384

Fax (920) 243-8385

Enumeration date Feb 26, 2008

Last updated in NPPES Apr 20, 2008

Taxonomy & classification

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians Primary

2085R0203X Therapeutic Radiology Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Carl Olson

Title Medical Director

Phone (414) 291-1556

Other identifiers

Identifier	Type	State	Issuer
CJ6385	Other	WI	TRAVELERS RR MEDICARE
32896900	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.

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Frequently asked questions

Where is Radiation Oncology of Wisconsin S C located?

The practice location on file with NPPES is in Mequon, WI.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-04-20. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Infinity Healthcare Physicians, S.C. Emergency Medicine Physician · Mequon, WI NPI 1053360933 Lou Ann Campbell-Peterson Hand Occupational Therapist · Mequon, WI NPI 1740231380 Catherine Stolz Occupational Therapist · Mequon, WI NPI 1194778555 Merle Orr Spinal Cord Injury Medicine Physician · Mequon, WI NPI 1336193176 Amy Laubenstein Occupational Therapist · Mequon, WI NPI 1518913888 Lori Kessenich Physical Therapist · Mequon, WI NPI 1366480345 Amy Gauger Physical Therapist · Mequon, WI NPI 1871531756 Irene Hughey Physical Therapist · Mequon, WI NPI 1184662686

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-20.