Dr. David Marshall, MD
171 Ashley Ave, Charleston, SC 29425 • +1-651-555-6478
Medical Education: Accredited U.S. Medical School (Class of 2009)
What This Doctor Actually Performs: CMS Medicare Utilization & Charleston Percentiles
NPI #1083669527 • CBSA Regional • Radiation Oncology
Dr. David Marshall, MD (NPI #1083669527) practices Radiation Oncology in Charleston, SC (29425) with sub-specialty concentration in 27 Active CMS HCPCS Codes, recording 1,024 annual CMS services across 246 distinct beneficiaries—placing this practice as a focused low-volume boutique caseload (11.76th Charleston percentile) (-0.76σ vs SC state mean, 5.88th statewide percentile).
Granular CPT/HCPCS billing distribution at 171 Ashley Ave shows Dr. David Marshall's primary concentration in Moderate-to-High Complexity Internal Medicine Follow-Up (code 99214: 461x/yr, 12th local percentile) alongside Established Preventive & Chronic Care Visit (99213: 266x/yr, $100–$137).
For out-of-network patients contacting +1-651-555-6478, Dr. Marshall's practice posts a $209.00 GPCI self-pay consult estimate ($209.00 patient-logged median, 4.88/5 composite reality score over 11 submissions).
Credentialed as an MD specialist with 17 years post-graduation experience since completing medical school at an LCME/COCA institution (2009), Dr. Marshall coordinates 27 Active CMS HCPCS Codes workups from 171 Ashley Ave (+1-651-555-6478).
Compared against Charleston, SC Radiation Oncology peers
1,024 annual services across 246 beneficiaries
Standard deviations from SC Radiation Oncology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Moderate-to-High Complexity Internal Medicine Follow-Up | 461 | 12th | $131 – $179 |
| 99213 | Established Preventive & Chronic Care Visit | 266 | 12th | $100 – $137 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 133 | 12th | $48 – $65 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 102 | 12th | $153 – $210 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 61 | 12th | $182 – $249 |
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Dr. David Marshall, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Marshall National Provider Identifier | NPI #1083669527 (MD) | CMS NPPES Registry (29425) |
| Dr. Marshall Charleston CMS Volume Rank | 11.76th Pct (1,024 CMS svcs; Z -0.760σ) | CMS Medicare Part B (SC Radiation Oncology) |
| 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 • 13 min lobby wait | 11 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.80/5 Listening • 4.81/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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