Christian C. Nwankwo, MD
NPI 1679772198ActiveIndividual· Internal Medicine, Nephrology· Saint Louis, MO
Internal Medicine, Nephrology (MD) with Nhs South LLC, practicing in Saint Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $666,488 for 3,021 claims, against $203,429 paid for services in 2024. Amgen Inc. was the largest of 15 companies reporting payments in 2025, $1,086 in all, mostly food and beverage. Lists Christian Hospital Northeast and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1679772198 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 13, 2007 |
| Last updated in NPPES | Oct 2, 2023 |
| Certified by provider | Oct 2, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 2010019786 | MO |
| Internal Medicine | 207R00000X | 2007007870 | MO |
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 - Internal Medicine (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 377 |
|---|---|
| Services billed | 2,322 across 24 procedure codes |
| Paid by Medicare | $203,429 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,021 · 4,933 30-day fills |
|---|---|
| Patients | 362 |
| Total drug cost | $666,488 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Emergency Medicine |
| Telehealth | Offers telehealth |
Medical group
- Nhs South LLCSaint Louis, MO · 9 clinicians
Hospital affiliations
- Christian Hospital NortheastSaint Louis, MO
- Mercy Hospital SouthSaint Louis, MO
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Ssm Health Depaul Hospital St LouisBridgeton, MO
- Ssm Health St Mary's Hospital - St LouisSaint Louis, MO
Other facilities
- Davita Cardinal DialysisDialysis facility · Florissant, MO
- Davita Natural Bridge DialysisDialysis facility · Saint Louis, MO
- Fmc - ChouteauDialysis facility · Saint Louis, MO
- Frontenac Home Dialysis CenterDialysis facility · Frontenac, MO
- Rai Care Center -HamptonDialysis facility · Saint Louis, MO
Industry payments (Open Payments)
- 2025$1,086 · 52 payments from 15 companies
- 2024$879.88 · 43 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $276.67 | 16 |
| Otsuka America Pharmaceutical, Inc. | $147.65 | 8 |
| Vantive US Healthcare LLC | $84.64 | 2 |
| Glaxosmithkline, LLC. | $74.31 | 4 |
| Novartis Pharmaceuticals Corporation | $70.59 | 3 |
What the 2025 payments were for
- Food and Beverage$1,086 · 52 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 111 nephrologists in Saint Louis · All nephrologists in Missouri