1. Home
  2. Directory
  3. Illinois
  4. Naperville
  5. Radiology
  6. NPI Profile

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: October 25, 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

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Fox Valley Radiation Oncology Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Fox Valley Radiation Oncology LLC, which bills Medicare for the services they deliver. Of these, 1 practice at this address. They are listed nearest first.

Clinicians, nearest first (4)

Neil Dasgupta, M.D.
Radiation Oncology
NPI 1316974363
120 SPALDING DR SUITE 111
Naperville, IL 60540
(630) 527-3788
✔ PECOS✔ Accepts MedicareSame address
Andy Su, MD
Radiation Oncology
NPI 1699897306
177 E BRUSH HILL RD
Elmhurst, IL 60126
(331) 221-5900
✔ PECOS✔ Accepts Medicare13 mi
Katarina Petras
Radiation Oncology
NPI 1043638570
2160 S 1ST AVE LOYOLA OUTPATIENT CENTER, 4300
Maywood, IL 60153
(708) 216-6006
✔ PECOS✔ Accepts Medicare18 mi
Oh-Hoon Kwon, MD
Radiation Oncology
NPI 1215981956
7410 W RAWSON AVE
Franklin, WI 53132
(414) 427-6230
✔ PECOS✔ Accepts Medicare80 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

Is Fox Valley Radiation Oncology LLC enrolled in Medicare?

Yes. Fox Valley Radiation Oncology LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Fox Valley Radiation Oncology LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians, all in Radiation Oncology, reassign their Medicare billing to Fox Valley Radiation Oncology LLC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 1 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Fox Valley Radiation Oncology LLC accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Fox Valley Radiation Oncology LLC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

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 3 months 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.