Chijoke H. Onyenwenyi, MD
NPI 1285941153ActiveIndividual· Internal Medicine, Nephrology· Evergreen Park, IL
Internal Medicine, Nephrology (MD) with Advocate Health and Hospitals Corporation and 2 other groups, practicing in Evergreen Park, Illinois. 605 Medicare patients in 2024, $317,753 paid; nearly all of their 1,186 Part D prescriptions were generic (91%). Bard Peripheral Vascular, Inc. was the largest of 3 companies reporting payments in 2025, $138.81 in all, mostly food and beverage. Lists Advocate Christ Hospital & Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1285941153 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 13, 2010 |
| Last updated in NPPES | Sep 20, 2023 |
| Certified by provider | Sep 20, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 036-129962 | IL |
| Internal Medicine | 207R00000X | 036129962 | 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 | 605 |
|---|---|
| Services billed | 2,650 across 41 procedure codes |
| Paid by Medicare | $317,753 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,186 · 2,949 30-day fills |
|---|---|
| Patients | 235 |
| Total drug cost | $255,039 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Advocate Health and Hospitals CorporationChicago, IL · 3,118 clinicians
- Nephrology Associates of Northern Illinois LtdAlgonquin, IL · 117 clinicians
- Southwest Nephrology Associates, S.C.Orland Park, IL · 13 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Osf Little Company of Mary Medical CenterEvergreen Park, IL
- Palos Community HospitalPalos Heights, IL
Other facilities
- Davita Beverly DialysisDialysis facility · Chicago, IL
- Fmc - CrestwoodDialysis facility · Crestwood, IL
- Fmc - Oak ForestDialysis facility · Oak Forest, IL
Industry payments (Open Payments)
- 2025$138.81 · 3 payments from 3 companies
- 2024$202.81 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bard Peripheral Vascular, Inc. | $95.07 | 1 |
| Fresenius USA Marketing, Inc. | $24.89 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $18.85 | 1 |
What the 2025 payments were for
- Food and Beverage$119.96 · 2 payments
- Education$18.85 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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