Quick answers
- Does Jacek M. Kowalski accept Medicare assignment?
- Yes. Medicare's clinician data says Jacek M. Kowalski 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 Jacek M. Kowalski see?
- In 2024, CMS data shows 42 Original Medicare patients and 88 services for Jacek M. Kowalski. This counts Original Medicare only and measures volume, not quality.
- What is Jacek M. Kowalski's NPI number?
- 1679653786. 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 Jacek M. Kowalski, 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 | 42 |
|---|---|
| Services billed to Medicare | 88 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)35 services
- Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)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 cholesterol69%
- High blood pressure64%
- Arthritis52%
- Osteoporosis33%
- Ischemic heart disease29%
- Anxiety29%
Hospitals where Jacek M. Kowalski works
Medicare's Facility Affiliation Data lists Jacek M. Kowalski 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.
- Aurora St Lukes Medical CenterMilwaukee, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520138
- West Allis Memorial HospitalWest Allis, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520139
Practice locations
Addresses where Jacek M. Kowalski is enrolled with Medicare (CMS data updated October 2, 2026).
- 8905 W Lincoln Ave, Suite 501West Allis, WI 53227 (414) 978‑2229
Group practices
Medicare enrollment lists Jacek M. Kowalski as a member of this group (CMS data updated October 2, 2026).
- Aurora Advanced Healthcare, Inc.1,124 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in West Allis
Clinicians with the same Medicare primary specialty in West Allis, WI — not a recommendation.
Other clinicians in Aurora Advanced Healthcare, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1981 (45 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679653786 |
| 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