Kareen Rose Elizabeth Simpson, M.D.
NPI 1780663963ActiveIndividual· Internal Medicine, Nephrology· Chicago, IL
Internal Medicine, Nephrology (M.D.) with Associates in Nephrology SC, practicing in Chicago, Illinois. Their prescriptions cost Medicare Part D more than their services did: $352,115 for 1,446 claims, against $221,771 paid for services in 2024. Amgen Inc. was the largest of 4 companies reporting payments in 2025, $210.11 in all, mostly food and beverage. Lists Advocate Christ Hospital & Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1780663963 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 16, 2006 |
| Last updated in NPPES | Nov 22, 2024 |
| Certified by provider | Nov 22, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 036105119 | 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 | 272 |
|---|---|
| Services billed | 1,814 across 25 procedure codes |
| Paid by Medicare | $221,771 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,446 · 2,787 30-day fills |
|---|---|
| Patients | 185 |
| Total drug cost | $352,115 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1992 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Associates in Nephrology SCChicago, IL · 52 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Advocate Trinity HospitalChicago, IL
- Ingalls Memorial HospitalHarvey, IL
Other facilities
- Concerto DialysisDialysis facility · Lincolnwood, IL
- Fkc - Evergreen ParkDialysis facility · Evergreen Park, IL
- Fmc - South ChicagoDialysis facility · Chicago, IL
- Fmc - South Deering DialysisDialysis facility · Chicago, IL
Industry payments (Open Payments)
- 2025$210.11 · 5 payments from 4 companies
- 2024$376.77 · 8 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $130.16 | 1 |
| Fresenius USA Marketing, Inc. | $47.75 | 2 |
| Otsuka America Pharmaceutical, Inc. | $16.33 | 1 |
| Novartis Pharmaceuticals Corporation | $15.87 | 1 |
What the 2025 payments were for
- Food and Beverage$210.11 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Nephrology providers in Chicago
- 1184694259
- 1235627332
- 1730816703
- 1245916071
- 1720769227
- 1023767886
- 1588676944
- 1205019270
- 1457733180
- 1710074976
- 1154984755
- 1952551517