Dr. Marsha Johnson Williams, MD
109 Bee St, Charleston, SC 29401 • +1-903-555-8915
Medical Education: Accredited U.S. Medical School (Class of 1997)
What This Doctor Actually Performs: CMS Medicare Utilization & Charleston Percentiles
NPI #1104112606 • CBSA Regional • Family Practice
CMS Medicare Part B utilization records credit Dr. Marsha Johnson Williams (MD, NPI 1104112606) at 109 Bee St in Charleston with 840 annual clinical services (242 beneficiaries), corresponding to a -0.25σ regional deviation and focused low-volume boutique caseload (15.63th Charleston percentile) with sub-specialty concentration in 7 Active CMS HCPCS Codes.
Procedural volume for Dr. Johnson Williams is led by HCPCS 99214 (Comprehensive Primary Care & Chronic Protocol Management — 353 annual services, $141–$193 GPCI cash estimate), followed by CPT 99213 (Focused Acute & Preventive Primary Care Evaluation, 260/yr) and CPT G0439 (Annual Wellness Biomarker & Preventive Screening Visit, 101/yr).
At 109 Bee St (29401), Dr. Marsha Johnson Williams, MD accommodates direct self-pay scheduling (hybrid in-clinic and telehealth video consults) at ~$209.00 per new consult (4.76/5 bedside rating).
Patients evaluating Dr. Marsha Johnson Williams in ZIP 29401 note 29 years of post-doctoral tenure (null, 1997) alongside 3.5 annual CMS procedures per patient.
Compared against Charleston, SC Family Practice peers
840 annual services across 242 beneficiaries
Standard deviations from SC Family Practice mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Comprehensive Primary Care & Chronic Protocol Management | 353 | 15.63th | $141 – $193 |
| 99213 | Focused Acute & Preventive Primary Care Evaluation | 260 | 18.63th | $108 – $148 |
| G0439 | Annual Wellness Biomarker & Preventive Screening Visit | 101 | 12th | $162 – $222 |
| 36415 | Routine Venipuncture Blood Biomarker Collection | 76 | 19.63th | $31 – $46 |
| 99204 | New Patient Primary Care Intake & Diagnostic Plan | 50 | 12th | $194 – $266 |
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Dr. Marsha Johnson Williams, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Johnson Williams National Provider Identifier | NPI #1104112606 (MD) | CMS NPPES Registry (29401) |
| Dr. Johnson Williams Charleston CMS Volume Rank | 15.63th Pct (840 CMS svcs; Z -0.252σ) | CMS Medicare Part B (SC Family Practice) |
| Fair Cash-Pay New-Patient Benchmark | $209.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Charleston, SC) |
| Waiting-Room Wait Time & Cash Friendliness | $209.00 avg paid • 11 min lobby wait | 5 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.76/5 Listening • 4.94/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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