Dr. Cassandra Williams, MD
3980a Sheridan DR Ste 200, Amherst, NY 14226 • +1-514-555-5148
Medical Education: Accredited U.S. Medical School (Class of 1999)
What This Doctor Actually Performs: CMS Medicare Utilization & Amherst Percentiles
NPI #1558546820 • CBSA Regional • Internal Medicine
Dr. Cassandra Williams, MD (NPI #1558546820) practices Internal Medicine in Amherst, NY (14226) with sub-specialty concentration in 10 Active CMS HCPCS Codes, recording 826 annual CMS services across 206 distinct beneficiaries—placing this practice as a focused low-volume boutique caseload (14.29th Amherst percentile) (-0.20σ vs NY state mean, 17.51th statewide percentile).
Medicare Part B line-item claims for Dr. Cassandra Williams (14226) place 99214 at the top of the practice ledger (372 yearly units, 14.29th metro rank), rounded out by 99213 and 93000.
Cash-pay intake data for NPI 1558546820 (3980a Sheridan DR Ste 200, Amherst) indicates $232.00 typical out-of-pocket visit spend against a $232.00 locality benchmark, paired with 12-minute average reception wait and 4.68/5 biomarker openness.
Spanning 27 years of clinical practice following 1999 graduation from medical training, Dr. Cassandra Williams integrates 10 Active CMS HCPCS Codes diagnostics for Amherst metro patients.
Compared against Amherst, NY Internal Medicine peers
826 annual services across 206 beneficiaries
Standard deviations from NY 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 | 372 | 14.29th | $195 – $267 |
| 99213 | Established Preventive & Chronic Care Visit | 215 | 17.29th | $149 – $204 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 107 | 15.29th | $71 – $97 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 83 | 12th | $229 – $313 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 50 | 14.29th | $271 – $371 |
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Dr. Cassandra Williams, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Williams National Provider Identifier | NPI #1558546820 (MD) | CMS NPPES Registry (14226) |
| Dr. Williams Amherst CMS Volume Rank | 14.29th Pct (826 CMS svcs; Z -0.204σ) | CMS Medicare Part B (NY Internal Medicine) |
| Fair Cash-Pay New-Patient Benchmark | $232.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Amherst, NY) |
| Waiting-Room Wait Time & Cash Friendliness | $232.00 avg paid • 12 min lobby wait | 10 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.58/5 Listening • 4.68/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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