Dr. David Duffy, MD
250 Bon Air Rd, Greenbrae, CA 94904 • +1-698-555-8921
Medical Education: Accredited U.S. Medical School (Class of 2012)
What This Doctor Actually Performs: CMS Medicare Utilization & Greenbrae Percentiles
NPI #1861414203 • CBSA Regional • Emergency Medicine
Dr. David Duffy, MD (NPI #1861414203) practices Emergency Medicine in Greenbrae, CA (94904) with sub-specialty concentration in 24 Active CMS HCPCS Codes, recording 721 annual CMS services across 421 distinct beneficiaries—placing this practice as a focused low-volume boutique caseload (0th Greenbrae percentile) (-0.26σ vs CA state mean, 20.91th statewide percentile).
Procedural volume for Dr. Duffy is led by HCPCS 99214 (Moderate-to-High Complexity Internal Medicine Follow-Up — 324 annual services, $213–$292 GPCI cash estimate), followed by CPT 99213 (Established Preventive & Chronic Care Visit, 187/yr) and CPT 93000 (In-Office 12-Lead Resting Electrocardiogram, 94/yr).
Cash-pay intake data for NPI 1861414203 (250 Bon Air Rd, Greenbrae) indicates $239.00 typical out-of-pocket visit spend against a $239.00 locality benchmark, paired with 17-minute average reception wait and 4.91/5 biomarker openness.
Spanning 14 years of clinical practice following 2012 graduation from medical training, Dr. David Duffy integrates 24 Active CMS HCPCS Codes diagnostics for Greenbrae metro patients.
Compared against Greenbrae, CA Emergency Medicine peers
721 annual services across 421 beneficiaries
Standard deviations from CA Emergency Medicine 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 | 324 | 12th | $213 – $292 |
| 99213 | Established Preventive & Chronic Care Visit | 187 | 12th | $163 – $223 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 94 | 12th | $78 – $107 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 72 | 12th | $250 – $343 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 43 | 12th | $296 – $406 |
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Dr. David Duffy, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Duffy National Provider Identifier | NPI #1861414203 (MD) | CMS NPPES Registry (94904) |
| Dr. Duffy Greenbrae CMS Volume Rank | 0.00th Pct (721 CMS svcs; Z -0.260σ) | CMS Medicare Part B (CA Emergency Medicine) |
| Fair Cash-Pay New-Patient Benchmark | $239.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Greenbrae, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $239.00 avg paid • 17 min lobby wait | 23 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.87/5 Listening • 4.91/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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