Joanna M. Niemiec, MD
NPI 1821016791ActiveIndividual· Internal Medicine, Nephrology· Rockford, IL
Internal Medicine, Nephrology (MD) with Rna of Rockford, PLLC, practicing in Rockford, Illinois. 767 Medicare patients in 2024, $300,023 paid; nearly all of their 2,530 Part D prescriptions were generic (92%). Amgen Inc. reported $18.48 in payments in 2025, mostly education. Lists Beloit Health System and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1821016791 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 18, 2006 |
| Last updated in NPPES | Jul 9, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 036110673 | 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 (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 767 |
|---|---|
| Services billed | 5,421 across 27 procedure codes |
| Paid by Medicare | $300,023 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,530 · 6,438 30-day fills |
|---|---|
| Patients | 546 |
| Total drug cost | $213,392 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Nephrology |
Medical group
- Rna of Rockford, PLLCBeloit, WI · 18 clinicians
Hospital affiliations
- Beloit Health SystemBeloit, WI
- Javon Bea HospitalRockford, IL
- Rochelle Community HospitalRochelle, IL
- Saint Anthony Medical CenterRockford, IL
- Uw HealthRockford, IL
Other facilities
- Davita Beloit DialysisDialysis facility · Beloit, WI
- Davita Churchview DialysisDialysis facility · Rockford, IL
- Davita Stonecrest DialysisDialysis facility · Rockford, IL
- Renviva, LLCDialysis facility · Rockford, IL
Industry payments (Open Payments)
- 2025$18.48 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $18.48 | 1 |
What the 2025 payments were for
- Education$18.48 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Nephrology providers in Rockford
- 1861816167
- 1043418908
- 1295753176
- 1336326388
- 1043232846
- 1457938854
- 1750934584
- 1720437338
- 1093343964
- 1992180806
- 1558593095
- 1730180878