Joseph A. Kowalczyk, MD
NPI 1831166255ActiveIndividual· Internal Medicine· Oak Lawn, IL
Internal Medicine (MD) in Oak Lawn, Illinois, trained at Rush Medical College of Rush University (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $1,162,753 for 22,201 claims, against $266,604 paid for services in 2024. Pfizer Inc. was the largest of 12 companies reporting payments in 2025, $760.22 in all, mostly food and beverage.
Overview
| NPI | 1831166255 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 3, 2006 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | — | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 724 |
|---|---|
| Services billed | 6,122 across 74 procedure codes |
| Paid by Medicare | $266,604 |
Part D prescriptions in 2024
| Prescriptions (claims) | 22,201 · 36,305 30-day fills |
|---|---|
| Patients | 934 |
| Total drug cost | $1,162,753 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Rush Medical College of Rush University |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Internal Medicine |
Medical group
- Adult Primary Care Center LtdOak Lawn, IL · 5 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Palos Community HospitalPalos Heights, IL
Other facilities
- Advocate Home Health Care ServHome health agency · Oakbrook, IL
- Elara Caring IIIHome health agency · Tinley Park, IL
- Home Care ExpertsHome health agency · Burr Ridge, IL
- Icare Home HealthHome health agency · Chicago, IL
- Interim Healthcare of ChicagoHome health agency · Alsip, IL
- Advocate HospiceHospice · Oak Brook, IL
- Moments Hospice of Chicago South LLCHospice · Willowbrook, IL
- Palos Community Hospital HospiceHospice · Lemont, IL
- St Croix Hospice Des PlainesHospice · Palos Heights, IL
- Aliya of Palos ParkNursing home · Palos Park, IL
- Aperion Care InternationalNursing home · Chicago, IL
- Avantara Chicago RidgeNursing home · Chicago Ridge, IL
- Mercy CircleNursing home · Chicago, IL
Industry payments (Open Payments)
- 2025$760.22 · 37 payments from 12 companies
- 2024$635.93 · 33 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $174.36 | 9 |
| Astrazeneca Pharmaceuticals LP | $118.30 | 6 |
| Novo Nordisk Inc | $95.50 | 5 |
| Lilly USA, LLC | $95.40 | 4 |
| Otsuka America Pharmaceutical, Inc. | $70.89 | 3 |
What the 2025 payments were for
- Food and Beverage$760.22 · 37 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 194 internal medicine physicians in Oak Lawn · All internal medicine physicians in Illinois