Dr. David Leff, DO
3638 E Southern Ave, Ste C 108, Mesa, AZ 85206 • +1-264-555-7985
Medical Education: Accredited U.S. Medical School (Class of 1999)
What This Doctor Actually Performs: CMS Medicare Utilization & Mesa Percentiles
NPI #1619956505 • CBSA Regional • Gastroenterology
Operating out of Mesa, AZ (3638 E Southern Ave, Ste C 108), Gastroenterology clinician Dr. David Leff, DO (accredited MD/DO training, 1999) maintains a focused low-volume boutique caseload (27.27th Mesa percentile) (26.21th AZ percentile; Z-score -0.49σ across 833 documented services) with sub-specialty concentration in 29 Active CMS HCPCS Codes.
Granular CPT/HCPCS billing distribution at 3638 E Southern Ave, Ste C 108 shows Dr. David Leff's primary concentration in Established Gastroenterology, GERD & IBD Evaluation (code 99214: 308x/yr, 27.27th local percentile) alongside Diagnostic Colonoscopy w/ Mucosal Tissue Biopsy (45380: 208x/yr, $511–$700).
Cash-pay intake data for NPI 1619956505 (3638 E Southern Ave, Ste C 108, Mesa) indicates $207.00 typical out-of-pocket visit spend against a $207.00 locality benchmark, paired with 13-minute average reception wait and 4.76/5 biomarker openness.
Clinical background for Dr. Leff (DO, NPI #1619956505) includes accredited doctoral training (1999, 27 yrs in practice) and virtual + in-office availability across AZ.
Compared against Mesa, AZ Gastroenterology peers
833 annual services across 438 beneficiaries
Standard deviations from AZ Gastroenterology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Established Gastroenterology, GERD & IBD Evaluation | 308 | 27.27th | $212 – $290 |
| 45380 | Diagnostic Colonoscopy w/ Mucosal Tissue Biopsy | 208 | 26.27th | $511 – $700 |
| 43239 | Upper GI Esophagogastroduodenoscopy (EGD) w/ Biopsy | 175 | 27.27th | $424 – $581 |
| 45385 | Colonoscopy w/ Snare Polypectomy Lesion Removal | 83 | 25.27th | $568 – $779 |
| 99204 | New Patient Digestive & Hepatology Consultation | 58 | 27.27th | $299 – $409 |
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Dr. David Leff, DO Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Leff National Provider Identifier | NPI #1619956505 (DO) | CMS NPPES Registry (85206) |
| Dr. Leff Mesa CMS Volume Rank | 27.27th Pct (833 CMS svcs; Z -0.495σ) | CMS Medicare Part B (AZ Gastroenterology) |
| Fair Cash-Pay New-Patient Benchmark | $207.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Mesa, AZ) |
| Waiting-Room Wait Time & Cash Friendliness | $207.00 avg paid • 13 min lobby wait | 7 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.55/5 Listening • 4.76/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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