William Andre Duff, MD
NPI 1366446213ActiveIndividual· Internal Medicine, Nephrology· Louisville, KY
Internal Medicine, Nephrology (MD) in Louisville, Kentucky, trained at University of Louisville School of Medicine (class of 1990). 662 Medicare patients in 2024, $164,159 paid; nearly all of their 1,285 Part D prescriptions were generic (93%). Fresenius USA Marketing, Inc. was the largest of 15 companies reporting payments in 2025, $1,148 in all, mostly food and beverage.
Overview
| NPI | 1366446213 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 9, 2005 |
| Last updated in NPPES | Aug 29, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 29503 | KY |
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 (IN); Practitioner - Nephrology (KY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 662 |
|---|---|
| Services billed | 2,575 across 21 procedure codes |
| Paid by Medicare | $164,159 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,285 · 3,246 30-day fills |
|---|---|
| Patients | 332 |
| Total drug cost | $119,411 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | University of Louisville School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Nephrology Associates of Kentuckiana PSCNew Albany, IN · 40 clinicians
Hospital affiliations
- Baptist Health HardinElizabethtown, KY
- Baptist Health LagrangeLa Grange, KY
- Baptist Health LouisvilleLouisville, KY
- Norton Hospitals, IncLouisville, KY
- Uofl Health - Jewish Hospital and Mary & Elizabeth HospitalLouisville, KY
Other facilities
- Fmc - SouthwestDialysis facility · Valley Station, KY
Industry payments (Open Payments)
- 2025$1,148 · 47 payments from 15 companies
- 2024$1,586 · 75 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Fresenius USA Marketing, Inc. | $227.44 | 11 |
| Astrazeneca Pharmaceuticals LP | $226.09 | 9 |
| Travere Therapeutics, Inc. | $196.85 | 7 |
| Otsuka America Pharmaceutical, Inc. | $150.08 | 3 |
| Bayer Healthcare Pharmaceuticals Inc. | $50.97 | 3 |
What the 2025 payments were for
- Food and Beverage$1,097 · 45 payments
- Education$51.16 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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