Quick answers
- Does Sara J. Kowalczuk accept Medicare assignment?
- Yes. Medicare's clinician data says Sara J. Kowalczuk 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 Sara J. Kowalczuk see?
- In 2024, CMS data shows 356 Original Medicare patients and 538 services for Sara J. Kowalczuk. This counts Original Medicare only and measures volume, not quality.
- What is Sara J. Kowalczuk's NPI number?
- 1871675561. 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 Sara J. Kowalczuk, 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 | 356 |
|---|---|
| Services billed to Medicare | 538 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)155 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)138 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)129 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)86 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)18 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%
- Arthritis75%
- Ischemic heart disease37%
- Anxiety28%
- Chronic kidney disease26%
Hospitals where Sara J. Kowalczuk works
Medicare's Facility Affiliation Data lists Sara J. Kowalczuk 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.
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140281
Practice locations
Addresses where Sara J. Kowalczuk is enrolled with Medicare (CMS data updated October 2, 2026).
Group practices
Medicare enrollment lists Sara J. Kowalczuk as a member of this group (CMS data updated October 2, 2026).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Other clinicians in Northwestern Medical Faculty Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| School | Rush Medical College Of Rush University |
| Graduation year | 1998 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871675561 |
| 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