Don Ryan Duff, MD
NPI 1154325900ActiveIndividual· Internal Medicine, Nephrology· Louisville, KY
Internal Medicine, Nephrology (MD) in Louisville, Kentucky, trained at University of Louisville School of Medicine (class of 1986). 730 Medicare patients in 2024, $225,516 paid; nearly all of their 3,466 Part D prescriptions were generic (96%). Alnylam Pharmaceuticals Inc. was the largest of 2 companies reporting payments in 2025, $43.74 in all, mostly food and beverage.
Overview
| NPI | 1154325900 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 9, 2005 |
| Last updated in NPPES | Aug 27, 2024 |
| Certified by provider | Aug 27, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 25228 | KY |
| Internal Medicine | 207R00000X | 25228 | 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 - Internal Medicine (KY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 730 |
|---|---|
| Services billed | 2,734 across 18 procedure codes |
| Paid by Medicare | $225,516 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,466 · 7,900 30-day fills |
|---|---|
| Patients | 593 |
| Total drug cost | $95,212 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | University of Louisville School of Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Internal Medicine |
Medical group
- Bluegrass Kidney Consultants PSCNew Albany, IN · 19 clinicians
Hospital affiliations
- Baptist Health LouisvilleLouisville, KY
- Norton Hospitals, IncLouisville, KY
- Norton-King's Daughters' HealthMadison, IN
- Uofl Health - Jewish Hospital and Mary & Elizabeth HospitalLouisville, KY
Other facilities
- Fmc - ShepherdsvilleDialysis facility · Shepherdsville, KY
- Pure Life Renal of LouisvilleDialysis facility · Louisville, KY
Industry payments (Open Payments)
- 2025$43.74 · 2 payments from 2 companies
- 2024$38.07 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alnylam Pharmaceuticals Inc. | $25.32 | 1 |
| Radiometer America, Inc | $18.42 | 1 |
What the 2025 payments were for
- Food and Beverage$43.74 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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