Quick answers
- Does Karolina Sierotnik accept Medicare assignment?
- Yes. Medicare's clinician data says Karolina Sierotnik 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 Karolina Sierotnik see?
- In 2024, CMS data shows 28 Original Medicare patients and 53 services for Karolina Sierotnik. This counts Original Medicare only and measures volume, not quality.
- What is Karolina Sierotnik's NPI number?
- 1194504316. 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 Karolina Sierotnik, 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 | 28 |
|---|---|
| Services billed to Medicare | 53 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 65 |
Most frequent services
- Critical care, first 30-74 minutes (99291)36 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%
- Heart failure68%
- Depression50%
- Diabetes46%
- Arthritis46%
Hospitals where Karolina Sierotnik works
Medicare's Facility Affiliation Data lists Karolina Sierotnik 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.
Practice locations
Addresses where Karolina Sierotnik is enrolled with Medicare (CMS data updated October 2, 2026).
- 1401 E State StRockford, IL 61104 (815) 489‑4400
Group practices
Medicare enrollment lists Karolina Sierotnik as a member of this group (CMS data updated October 2, 2026).
- Swedishamerican Hospital389 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Rockford
Clinicians with the same Medicare primary specialty in Rockford, IL — not a recommendation.
Other clinicians in Swedishamerican Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2023 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194504316 |
| 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