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Radiation Oncology

Nagendra S. Koneru, MD

Works at hospitals in Guttenberg, IA · Maywood, IL · Freeport, IL … · Iowa, Illinois, Wisconsin

Summary

Dr. Nagendra S. Koneru, MD is a radiation oncologist at 1045 W Stephenson St, Freeport, IL 61032. Phone: (815) 599-6000. Accepts Medicare assignment. In 2024, Nagendra S. Koneru had 107 Original Medicare patients and 1,536 services. NPI 1508989260. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Nagendra S. Koneru, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Nagendra S. Koneru accept Medicare assignment?
Yes. Medicare's clinician data says Nagendra S. Koneru accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Nagendra S. Koneru see?
In 2024, CMS data shows 107 Original Medicare patients and 1,536 services for Nagendra S. Koneru. This counts Original Medicare only and measures volume, not quality.
What is Nagendra S. Koneru's NPI number?
1508989260. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Nagendra S. Koneru, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients107
Services billed to Medicare1,536
Different services or procedures23
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Ct guidance for insertion of radiation therapy fields (77014)540 services
  2. Radiation treatment management, 5 treatment sessions (77427)203 services
  3. Design and construction of complex radiation treatment device (77334)197 services
  4. Calculation of radiation therapy dose (77300)137 services
  5. Complex radiation therapy planning (77263)66 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol68%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)67%
  • Arthritis43%
  • Ischemic heart disease37%
  • Diabetes29%

Hospitals where Nagendra S. Koneru works

Medicare's Facility Affiliation Data lists Nagendra S. Koneru at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Guttenberg Municipal HospitalGuttenberg, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161312
  • Loyola University Medical CenterMaywood, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140276
  • Mercyhealth FHN HospitalFreeport, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140160
  • MercyOne Dubuque Medical CenterDubuque, IA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 160069
  • The Monroe ClinicMonroe, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520028

Practice locations

Addresses where Nagendra S. Koneru is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.

Group practices

Medicare enrollment lists Nagendra S. Koneru as a member of these groups (CMS data updated October 2, 2026).

  • Loyola University Medical Center953 clinicians in the group
  • Freeport Memorial Hospital178 clinicians in the group
  • Freeport Regional Health Care Foundation92 clinicians in the group
  • Mercy Medical Center-Dubuque22 clinicians in the group

Specialties

Find other Radiation Oncology doctors in Illinois →

Other radiation oncologists in Freeport

Clinicians with the same Medicare primary specialty in Freeport, IL — not a recommendation.

All radiation oncologists in Freeport →

Other clinicians in Loyola University Medical Center

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Missouri, Columbia School Of Medicine
Graduation year2002 (24 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1508989260
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians