Don Duff, MD
NPI 1154325900 · Nephrology Physician · Louisville, KY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Don Duff, MD is a Nephrology Physician provider in Louisville, KY (NPI 1154325900).
Provider details
- NPI number
- 1154325900
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 25228 (KY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,697 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 763 | $78 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 470 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 430 | $89 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 189 | $124 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 149 | $130 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 554 | 171 |
| Furosemide | 418 | 147 |
| Amlodipine Besylate | 306 | 106 |
| Metoprolol Succinate | 221 | 68 |
| Torsemide | 213 | 77 |
| Potassium Chloride | 123 | 44 |
| Hydralazine Hcl | 105 | 36 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$38 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 727 Mount Tabor Rd Ste aNew Albany, IN 47150-6951Phone: (812) 981-3111Fax: (812) 981-3829
Registry dates
- Enumerated
- 2005-06-09
- Last updated
- 2024-08-27
- Certified
- 2024-08-27
Frequently asked questions
- What is Don Duff's NPI number?
- Don Duff's National Provider Identifier (NPI) is 1154325900, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Don Duff's specialty?
- Don Duff is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Don Duff located?
- Don Duff's practice location on file with NPPES is 3999 Dutchmans Ln Ste 4a, Louisville, KY 40207-4745.
- What is Don Duff's phone number?
- The practice phone number listed in the NPPES registry for Don Duff is (502) 365-2655.
- Does Don Duff accept Medicare?
- Don Duff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Don Duff's NPI active?
- Yes — Don Duff's NPI (1154325900) is active in the NPPES registry as of the last update on 2024-08-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.