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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

FOX VALLEY RADIATION ONCOLOGY LLC
NPI 1720141047
Radiology - Radiation Oncology in Naperville, IL

Active since December 18, 2006
120 SPALDING DR, SUITE 111, NAPERVILLE, IL 60540(630) 646-2273(630) 646-6165 Get Directions Write a Review

NPPES record last updated: July 24, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

About Fox Valley Radiation Oncology Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

FOX VALLEY RADIATION ONCOLOGY LLC (NPI 1720141047) is a healthcare organization registered as a radiation oncology in Naperville, Illinois and active in the NPI registry since December 2006. The organization lists Oh-hoon Kwon, Managing Partner, as its authorized official.

NPPES Registry Identity

NPI1720141047
Entity TypeOrganization
Primary Taxonomy2085R0001X
Legal Business NameFOX VALLEY RADIATION ONCOLOGY LLC
Location Address120 SPALDING DR, SUITE 111Naperville, IL 60540-6508
Mailing Address115 E Ogden Ave, Suite 105Naperville, IL 60563 · (312) 498-4263 · Fax (630) 646-6165
Phone(630) 646-2273
Fax(630) 646-6165
Organization SubpartNo
Authorized OfficialOh-hoon KwonManaging Partner · (312) 498-4263
Enumeration DateDecember 18, 2006
Last NPPES UpdateJuly 24, 2026
NPPES CertifiedJuly 24, 2026
✔ NPI 1720141047 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0001X
License✔ Licensed in IL · 036092813
Definition
A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.
120 SPALDING DR, Naperville, IL 60540
Open in Google Maps ↗

Other Identifiers 1

Other2233109IL · Blue Cross Blue Shield

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JAMES R DAVIS MD
Specialist
120 SPALDING DR, SUITE 307
NAPERVILLE, IL 60540
Dupage County (630) 355-1102
SHEILA TREFTZ APN
Nurse Practitioner (Acute Care)
120 SPALDING DR, SUITE 401
NAPERVILLE, IL 60540
Dupage County (630) 416-4501
JOSEPH KASH MD
Internal Medicine (Hematology & Oncology)
120 SPALDING DR, SUITE 111
NAPERVILLE, IL 60540
Dupage County (630) 527-3788
MRS. WENDY ANN PAWELSKI LCPC,CADC
Counselor (Professional)
120 SPALDING DR, MOB II SUITE 408
NAPERVILLE, IL 60540
Dupage County (630) 527-5484
EDWARD HEALTH VENTURES
Psychiatry & Neurology (Neurology)
120 SPALDING DR, STE 207
NAPERVILLE, IL 60540
Dupage County (630) 527-7730
KRISTIN R. WATKINS APN-CNP
Nurse Practitioner
120 SPALDING DR
NAPERVILLE, IL 60540
Dupage County (630) 369-7700
JAMES W WIELGOLEWSKI MD
Surgery
120 SPALDING DR, SUITE 100
NAPERVILLE, IL 60540
Dupage County (630) 961-0423
HASSAN PERVEZ M.D.
Internal Medicine (Hematology & Oncology)
120 SPALDING DR, SUITE 111
NAPERVILLE, IL 60540
Dupage County (630) 527-3788

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 Fox Valley Radiation Oncology LLC's NPI number?

The NPI number for Fox Valley Radiation Oncology LLC is 1720141047. It was assigned to this organization in the NPPES registry on December 18, 2006.

Where is Fox Valley Radiation Oncology LLC located?

Fox Valley Radiation Oncology LLC is located at 120 Spalding Dr Suite 111, Naperville, IL 60540. The listed phone number is (630) 646-2273.

What is Fox Valley Radiation Oncology LLC's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

When was this NPI record last updated?

The NPPES record for Fox Valley Radiation Oncology LLC was last updated on July 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 38 days 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.