Anca Ioana Zegrean, M.D.
NPI 1508009416ActiveIndividual· Internal Medicine, Nephrology· Libertyville, IL
Internal Medicine, Nephrology (M.D.) with Associates in Nephrology SC, practicing in Libertyville, Illinois. Their prescriptions cost Medicare Part D more than their services did: $297,884 for 1,442 claims, against $183,475 paid for services in 2024. Amgen Inc. was the largest of 22 companies reporting payments in 2025, $2,143 in all, mostly food and beverage. Lists Advocate Condell Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1508009416 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 8, 2009 |
| 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 | 036125012 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 653 |
|---|---|
| Services billed | 2,905 across 23 procedure codes |
| Paid by Medicare | $183,475 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,442 · 3,604 30-day fills |
|---|---|
| Patients | 250 |
| Total drug cost | $297,884 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Associates in Nephrology SCChicago, IL · 52 clinicians
Hospital affiliations
- Advocate Condell Medical CenterLibertyville, IL
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Memorial HospitalChicago, IL
Other facilities
- Concerto DialysisDialysis facility · Lincolnwood, IL
- Davita Waukegan Renal CenterDialysis facility · Waukegan, IL
- Fkc - Lake BluffDialysis facility · Lake Bluff, IL
- Fmc - MundeleinDialysis facility · Mundelein, IL
Industry payments (Open Payments)
- 2025$2,143 · 88 payments from 22 companies
- 2024$2,011 · 89 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $346.01 | 23 |
| Akebia Therapeutics Inc | $293.02 | 8 |
| Calliditas Therapeutics US Inc. | $257.96 | 6 |
| Travere Therapeutics, Inc. | $131.61 | 4 |
| Ani Pharmaceuticals, Inc. | $118.65 | 4 |
What the 2025 payments were for
- Food and Beverage$2,121 · 87 payments
- Education$22.20 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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