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RADIATION ONCOLOGY CONSULTANTS, LTD
NPI 1164412417
Radiology - Radiation Oncology in Oak Brook, IL

Active since October 27, 2005
700 COMMERCE DR, SUITE 500, OAK BROOK, IL 60523(847) 698-0600(847) 698-0601 Get Directions Write a Review

NPPES record last updated: March 29, 2017. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 29, 2017, Oct 11, 2016 (2 updates tracked since 2016).

About Radiation Oncology Consultants, Ltd NPPES

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

RADIATION ONCOLOGY CONSULTANTS, LTD (NPI 1164412417) is a healthcare organization registered as a radiation oncology in Oak Brook, Illinois and active in the NPI registry since October 2005. The organization lists William F Hartsell, President, as its authorized official.

NPPES Registry Identity

NPI1164412417
Entity TypeOrganization
Primary Taxonomy2085R0001X
Legal Business NameRADIATION ONCOLOGY CONSULTANTS, LTD
Location Address700 COMMERCE DR, SUITE 500Oak Brook, IL 60523-1546
Mailing Address700 Commerce Dr, Suite 500Oak Brook, IL 60523-1546 · (847) 698-0600 · Fax (847) 698-0601
Phone(847) 698-0600
Fax(847) 698-0601
Organization SubpartNo
Authorized OfficialWilliam F HartsellPresident · (847) 698-0600
Enumeration DateOctober 27, 2005
Last NPPES UpdateMarch 29, 20172 updates tracked since enumeration
✔ NPI 1164412417 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 · 042000055
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.
700 COMMERCE DR, Oak Brook, IL 60523
Open in Google Maps ↗

Other Identifiers 8

Medicare PIN558620
OtherCN5041Railroad Medicare Pin
OtherL007019Champus Pin
Medicare PIN778401
Other01615044Blue Shield Pin
Medicare PIN209168
Other62105Advocate Pho Group
Other=========000Advocate Ahc Group

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE 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)

Radiation Oncology Consultants, Ltd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

30

Medicare enrollment records show 30 clinicians reassign Medicare billing to Radiation Oncology Consultants, Ltd, which bills Medicare for the services they deliver. Of these, 5 practice within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 2

Radiation Oncology29
Nurse Practitioner1

Nearest to this location (20)

See all 30
William Hartsell, M.D.
Radiation Oncology
NPI 1770574881
1 SALT CREEK LN
Hinsdale, IL 60521
(630) 286-5500
✔ PECOS✔ Accepts Medicare2.2 mi
Kapila Kalakota, M.D.
Radiation Oncology
NPI 1841428281
1 SALT CREEK LN AMITA HEALTH CANCER INSTITUTE
Hinsdale, IL 60521
(630) 286-5808
✔ PECOS✔ Accepts Medicare2.2 mi
Chirag Modi, M.D.
Radiation Oncology
NPI 1649701087
1 SALT CREEK LN
Hinsdale, IL 60521
(630) 286-5500
✔ PECOS✔ Accepts Medicare2.2 mi
Patrick Sweeney, M.D.
Radiation Oncology
NPI 1316938384
1 SALT CREEK LN AMITA HEALTH CANCER INSTITUTE
Hinsdale, IL 60521
(630) 286-5500
✔ PECOS✔ Accepts Medicare2.2 mi
Preeti Parhar, MD
Radiation Oncology
NPI 1164680393
3815 HIGHLAND AVE
Downers Grove, IL 60515
(630) 275-2300
✔ PECOS✔ Accepts Medicare4.4 mi
Alexander Harris, M.D.
Radiation Oncology
NPI 1700236635
800 BIESTERFIELD RD STE 110
Elk Grove Village, IL 60007
(847) 981-5760
✔ PECOS✔ Accepts Medicare11 mi
Kaitlin Qualls, MD
Radiation Oncology
NPI 1366904989
800 BIESTERFIELD RD STE 11O
Elk Grove Village, IL 60007
(847) 981-5760
✔ PECOS✔ Accepts Medicare11 mi
Ramji Rajendran, MD
Radiation Oncology
NPI 1982760773
800 BIESTERFIELD RD SUITE 110
Elk Grove Village, IL 60007
(847) 981-5760
✔ PECOS✔ Accepts Medicare11 mi
Christy Kesslering, M.D.
Radiation Oncology
NPI 1427049543
4405 WEAVER PKWY
Warrenville, IL 60555
(630) 352-5350
✔ PECOS12 mi
Vinai Gondi, MD
Radiation Oncology
NPI 1457516395
4405 WEAVER PKWY
Warrenville, IL 60555
(630) 352-5350
✔ PECOS✔ Accepts Medicare12 mi
Nasiruddin Mohammed
Radiation Oncology
NPI 1912111527
4405 WEAVER PKWY
Warrenville, IL 60555
(630) 352-5350
✔ PECOS✔ Accepts Medicare12 mi
Arpi Thukral, MD
Radiation Oncology
NPI 1619032885
4405 WEAVER PKWY
Warrenville, IL 60555
(630) 352-5350
✔ PECOS✔ Accepts Medicare12 mi
Adil Akthar, M.D.
Radiation Oncology
NPI 1598175531
4455 WEAVER PKWY
Warrenville, IL 60555
(630) 821-6400
✔ PECOS✔ Accepts Medicare12 mi
Neal Andruska, MD, PHD
Radiation Oncology
NPI 1972035798
4455 WEAVER PKWY
Warrenville, IL 60555
(630) 821-6400
✔ PECOS✔ Accepts Medicare12 mi
Arica Hirsch, M.D.
Radiation Oncology
NPI 1770574758
1700 LUTHER LN
Park Ridge, IL 60068
(847) 723-8030
✔ PECOS✔ Accepts Medicare14 mi
Tanya Powell, M.D.
Radiation Oncology
NPI 1043201072
1700 LUTHER LN
Park Ridge, IL 60068
(630) 205-6612
✔ PECOS✔ Accepts Medicare14 mi
Ian Winter, MD
Radiation Oncology
NPI 1013413285
1700 LUTHER LN
Park Ridge, IL 60068
(847) 723-8030
✔ PECOS✔ Accepts Medicare14 mi
Michael Kharouta, MD
Radiation Oncology
NPI 1336670322
900 W NELSON ST
Chicago, IL 60657
(773) 296-7076
✔ PECOS✔ Accepts Medicare16 mi
Ryan Rhome, MD, PHD
Radiation Oncology
NPI 1023370400
900 W NELSON ST
Chicago, IL 60657
(843) 412-9919
✔ PECOS✔ Accepts Medicare16 mi
Rajiv Patel, MD
Radiation Oncology
NPI 1194763250
1555 N BARRINGTON RD STE 1400
Hoffman Estates, IL 60169
(847) 755-8400
✔ PECOS✔ Accepts Medicare17 mi
See all 30 clinicians

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 Radiation Oncology Consultants, Ltd's NPI number?

The NPI number for Radiation Oncology Consultants, Ltd is 1164412417. It was assigned to this organization in the NPPES registry on October 27, 2005.

Where is Radiation Oncology Consultants, Ltd located?

Radiation Oncology Consultants, Ltd is located at 700 Commerce Dr Suite 500, Oak Brook, IL 60523. The listed phone number is (847) 698-0600.

What is Radiation Oncology Consultants, Ltd's specialty?

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

Is Radiation Oncology Consultants, Ltd enrolled in Medicare?

Yes. Radiation Oncology Consultants, Ltd is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Radiation Oncology Consultants, Ltd?

According to the CMS Revalidation Reassignment List (October 2026 release), 30 clinicians in 2 Medicare specialties reassign their Medicare billing to Radiation Oncology Consultants, Ltd. 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. The largest specialties are Radiation Oncology (29) and Nurse Practitioner (1). Of these, 5 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Radiation Oncology Consultants, Ltd accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Radiation Oncology Consultants, Ltd 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 Radiation Oncology Consultants, Ltd was last updated on March 29, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.