Quick answers
- Does Katarina G. Petras accept Medicare assignment?
- Yes. Medicare's clinician data says Katarina G. Petras 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 Katarina G. Petras see?
- In 2024, CMS data shows 163 Original Medicare patients and 2,334 services for Katarina G. Petras. This counts Original Medicare only and measures volume, not quality.
- What is Katarina G. Petras's NPI number?
- 1043638570. 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 Katarina G. Petras, 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 patients | 163 |
|---|---|
| Services billed to Medicare | 2,334 |
| Different services or procedures | 29 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy (G6002)1,012 services
- Calculation of radiation therapy dose (77300)281 services
- Radiation treatment management, 5 treatment sessions (77427)222 services
- Design and construction of complex radiation treatment device (77334)210 services
- Complex radiation therapy planning (77263)79 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 cholesterol75%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- Arthritis52%
- Diabetes33%
- Ischemic heart disease28%
Hospitals where Katarina G. Petras works
Medicare's Facility Affiliation Data lists Katarina G. Petras 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.
- Edward HospitalNaperville, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140231
- Elmhurst Memorial HospitalElmhurst, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140200
- Swedish HospitalChicago, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140114
Practice locations
Addresses where Katarina G. Petras is enrolled with Medicare (CMS data updated October 2, 2026).
- 120 Spalding Dr, Suite 111Naperville, IL 60540 (630) 646‑6161
Group practices
Medicare enrollment lists Katarina G. Petras as a member of this group (CMS data updated October 2, 2026).
- Fox Valley Radiation Oncology LLC4 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Naperville
Clinicians with the same Medicare primary specialty in Naperville, IL — not a recommendation.
Other clinicians in Fox Valley Radiation Oncology LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043638570 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians