Dr. Marcia Williams-Lyons, DO
939 E Emerald Ave Ste 610, Knoxville, TN 37917 • +1-366-555-6046
Medical Education: Accredited U.S. Medical School (Class of 2014)
What This Doctor Actually Performs: CMS Medicare Utilization & Knoxville Percentiles
NPI #1043400526 • CBSA Regional • Nephrology
Dr. Marcia Williams-Lyons, DO (NPI #1043400526) practices Nephrology in Knoxville, TN (37917) with sub-specialty concentration in 24 Active CMS HCPCS Codes, recording 1,596 annual CMS services across 384 distinct beneficiaries—placing this practice as a mid-cohort balanced caseload (46.15th Knoxville percentile) (-0.52σ vs TN state mean, 37.82th statewide percentile).
Procedural volume for Dr. Williams-Lyons is led by HCPCS 99214 (Chronic Kidney Disease eGFR, uACR & Electrolyte Management — 766 annual services, $185–$254 GPCI cash estimate), followed by CPT 90960 (Monthly Adult ESRD Renal Replacement Oversight, 351/yr) and CPT 99215 (High-Complexity Cardiorenal & Resistant Hypertension Visit, 287/yr).
Uninsured and high-deductible cash patients visiting Dr. Marcia Williams-Lyons in Knoxville (37917) face an estimated $201.00 initial evaluation fee at 939 E Emerald Ave Ste 610 (hybrid in-clinic and telehealth video consults; 11-minute average reception wait; bedside manner 4.67/5 from 7 verified reports).
NPI registry verification (#1043400526) confirms Dr. Marcia Williams-Lyons's DO standing serving CBSA 37917 with a 4.64/5 patient scorecard.
Compared against Knoxville, TN Nephrology peers
1,596 annual services across 384 beneficiaries
Standard deviations from TN 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 | 766 | 46.15th | $185 – $254 |
| 90960 | Monthly Adult ESRD Renal Replacement Oversight | 351 | 43.15th | $370 – $508 |
| 99215 | High-Complexity Cardiorenal & Resistant Hypertension Visit | 287 | 44.15th | $270 – $370 |
| 99204 | New Patient Nephrology & Proteinuria Consultation | 192 | 48.15th | $255 – $349 |
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Dr. Marcia Williams-Lyons, DO Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Williams-Lyons National Provider Identifier | NPI #1043400526 (DO) | CMS NPPES Registry (37917) |
| Dr. Williams-Lyons Knoxville CMS Volume Rank | 46.15th Pct (1,596 CMS svcs; Z -0.521σ) | CMS Medicare Part B (TN Nephrology) |
| Fair Cash-Pay New-Patient Benchmark | $201.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Knoxville, TN) |
| Waiting-Room Wait Time & Cash Friendliness | $201.00 avg paid • 11 min lobby wait | 7 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.67/5 Listening • 4.93/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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