Dr. William Sim, MD
11480 Brookshire Ave, 200, Downey, CA 90241 • +1-615-555-8499
Medical Education: Accredited U.S. Medical School (Class of 2004)
What This Doctor Actually Performs: CMS Medicare Utilization & Downey Percentiles
NPI #1437256906 • CBSA Regional • Internal Medicine
Anchored in Downey, CA 90241, Dr. William Sim, MD (NPI 1437256906) logged 5,946 annual procedures (top-decile high-throughput specialist (90.91th percentile in Downey), 88.33th CA percentile, +0.05σ) with sub-specialty concentration in 35 Active CMS HCPCS Codes.
Dr. Sim's longitudinal care intensity (7.6 billed units per patient across 787 individuals) centers on 99214 (2176 annual units) and 99213 ($123–$168 cash range).
Self-pay new patient consultations with Dr. Sim (CPT 99204 GPCI-adjusted benchmark) estimate around $239.00 (community reported average: $239.00) with in-person clinic visits only, 9-minute average reception wait, and a 4.51/5 modern protocol openness score across 9 patient logs.
Patients evaluating Dr. William Sim in ZIP 90241 note 22 years of post-doctoral tenure (null, 2004) alongside 7.6 annual CMS procedures per patient.
Top 10% Internal Medicine volume leader in Downey, CA
5,946 annual services across 787 beneficiaries
Standard deviations from CA Internal 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 | 2,176 | 90.91th | $160 – $220 |
| 99213 | Established Preventive & Chronic Care Visit | 1,257 | 88.91th | $123 – $168 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 629 | 92.91th | $59 – $80 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 484 | 94.91th | $188 – $258 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 290 | 91.91th | $223 – $306 |
| 96372 | Therapeutic Subcutaneous/Intramuscular Injection Administration (35 HCPCS billing breadth) | 1,110 | 90.91th | $145 – $210 |
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Dr. William Sim, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Sim National Provider Identifier | NPI #1437256906 (MD) | CMS NPPES Registry (90241) |
| Dr. Sim Downey CMS Volume Rank | 90.91th Pct (5,946 CMS svcs; Z +0.047σ) | CMS Medicare Part B (CA Internal Medicine) |
| Fair Cash-Pay New-Patient Benchmark | $239.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Downey, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $239.00 avg paid • 9 min lobby wait | 9 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.70/5 Listening • 4.51/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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