Andrew Kowalski, M.D.
NPI 1114293123ActiveIndividual· Internal Medicine, Nephrology· Addison, IL
Internal Medicine, Nephrology (M.D.) with Nephrology Associates of Northern Illinois Ltd, practicing in Addison, Illinois. Their prescriptions cost Medicare Part D more than their services did: $247,355 for 744 claims, against $68,490 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 12 companies reporting payments in 2025, $758.99 in all, mostly food and beverage. Lists Loyola University Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1114293123 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 25, 2012 |
| Last updated in NPPES | Aug 4, 2025 |
| Certified by provider | Aug 4, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 036137310 | 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 - Nephrology (IL); Practitioner - Nephrology (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 214 |
|---|---|
| Services billed | 749 across 43 procedure codes |
| Paid by Medicare | $68,490 |
Part D prescriptions in 2024
| Prescriptions (claims) | 744 · 1,320 30-day fills |
|---|---|
| Patients | 107 |
| Total drug cost | $247,355 |
| Generic share | 62% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Nephrology Associates of Northern Illinois LtdAlgonquin, IL · 117 clinicians
Hospital affiliations
- Loyola University Medical CenterMaywood, IL
- Macneal HospitalBerwyn, IL
Other facilities
- Fmc - Midway DialysisDialysis facility · Chicago, IL
Industry payments (Open Payments)
- 2025$758.99 · 27 payments from 12 companies
- 2024$553.46 · 20 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $190.59 | 10 |
| Sanofi-Aventis U.S. LLC | $110.93 | 1 |
| Bard Peripheral Vascular, Inc. | $95.06 | 1 |
| Otsuka America Pharmaceutical, Inc. | $87.23 | 3 |
| Travere Therapeutics, Inc. | $75.36 | 3 |
What the 2025 payments were for
- Food and Beverage$758.99 · 27 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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