Dr. William Karlon, MD
185 Berry St, San Francisco, CA 94107 • +1-399-555-8048
Medical Education: Accredited U.S. Medical School (Class of 1992)
What This Doctor Actually Performs: CMS Medicare Utilization & San Francisco Percentiles
NPI #1154365088 • CBSA 41860 • Hematology
Statistical peer benchmarking across CA Hematology providers positions Dr. William Karlon, MD in San Francisco at -0.45σ (0th city percentile / 3.85th state percentile, 508 Medicare beneficiaries), with clinical focus spanning 14 Active CMS HCPCS Codes.
Dr. Karlon's longitudinal care intensity (1.4 billed units per patient across 508 individuals) centers on 99214 (328 annual units) and 99213 ($115–$157 cash range).
Cash-pay intake data for NPI 1154365088 (185 Berry St, San Francisco) indicates $250.00 typical out-of-pocket visit spend against a $250.00 locality benchmark, paired with 13-minute average reception wait and 4.88/5 biomarker openness.
Spanning 34 years of clinical practice following 1992 graduation from medical training, Dr. William Karlon integrates 14 Active CMS HCPCS Codes diagnostics for San Francisco metro patients.
Compared against San Francisco, CA Hematology peers
728 annual services across 508 beneficiaries
Standard deviations from CA Hematology 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 | 328 | 12th | $150 – $205 |
| 99213 | Established Preventive & Chronic Care Visit | 189 | 12th | $115 – $157 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 95 | 12th | $55 – $75 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 73 | 12th | $176 – $241 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 44 | 12th | $208 – $286 |
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Dr. William Karlon, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Karlon National Provider Identifier | NPI #1154365088 (MD) | CMS NPPES Registry (94107) |
| Dr. Karlon San Francisco CMS Volume Rank | 0.00th Pct (728 CMS svcs; Z -0.451σ) | CMS Medicare Part B (CA Hematology) |
| Fair Cash-Pay New-Patient Benchmark | $250.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (San Francisco, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $250.00 avg paid • 13 min lobby wait | 3 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.94/5 Listening • 4.88/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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