Dr. William Duff, MD
6400 Dutchmans Pkwy, Ste 250, Louisville, KY 40205 • +1-847-555-1452
Medical Education: Accredited U.S. Medical School (Class of 2010)
What This Doctor Actually Performs: CMS Medicare Utilization & Louisville Percentiles
NPI #1366446213 • CBSA Regional • Nephrology
Operating out of Louisville, KY (6400 Dutchmans Pkwy, Ste 250), Nephrology clinician Dr. William Duff, MD (accredited MD/DO training, 2010) maintains a focused low-volume boutique caseload (28.57th Louisville percentile) (61.73th KY percentile; Z-score +0.13σ across 2,575 documented services) with sub-specialty concentration in 21 Active CMS HCPCS Codes.
Procedural volume for Dr. Duff is led by HCPCS 99214 (Chronic Kidney Disease eGFR, uACR & Electrolyte Management — 1236 annual services, $139–$191 GPCI cash estimate), followed by CPT 90960 (Monthly Adult ESRD Renal Replacement Oversight, 567/yr) and CPT 99215 (High-Complexity Cardiorenal & Resistant Hypertension Visit, 464/yr).
For out-of-network patients contacting +1-847-555-1452, Dr. Duff's practice posts a $209.00 GPCI self-pay consult estimate ($209.00 patient-logged median, 4.87/5 composite reality score over 18 submissions).
Clinical background for Dr. Duff (MD, NPI #1366446213) includes accredited doctoral training (2010, 16 yrs in practice) and dedicated on-site consultations at 6400 Dutchmans Pkwy, Ste 250.
Compared against Louisville, KY Nephrology peers
2,575 annual services across 662 beneficiaries
Standard deviations from KY Nephrology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Chronic Kidney Disease eGFR, uACR & Electrolyte Management | 1,236 | 28.57th | $139 – $191 |
| 90960 | Monthly Adult ESRD Renal Replacement Oversight | 567 | 28.57th | $279 – $382 |
| 99215 | High-Complexity Cardiorenal & Resistant Hypertension Visit | 464 | 25.57th | $203 – $279 |
| 99204 | New Patient Nephrology & Proteinuria Consultation | 309 | 25.57th | $192 – $263 |
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Dr. William Duff, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Duff National Provider Identifier | NPI #1366446213 (MD) | CMS NPPES Registry (40205) |
| Dr. Duff Louisville CMS Volume Rank | 28.57th Pct (2,575 CMS svcs; Z +0.126σ) | CMS Medicare Part B (KY Nephrology) |
| Fair Cash-Pay New-Patient Benchmark | $209.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Louisville, KY) |
| Waiting-Room Wait Time & Cash Friendliness | $209.00 avg paid • 22 min lobby wait | 18 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.68/5 Listening • 4.93/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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