Dr. William Sullivan, MD
Joslin Diabetes Center, One Joslin Place, Boston, MA 02215 • +1-399-555-8540
Medical Education: Accredited U.S. Medical School (Class of 2003)
What This Doctor Actually Performs: CMS Medicare Utilization & Boston Percentiles
NPI #1922107234 • CBSA 14460 • Endocrinology
Anchored in Boston, MA 02215, Dr. William Sullivan, MD (NPI 1922107234) logged 1,086 annual procedures (mid-cohort balanced caseload (48.89th Boston percentile), 32.59th MA percentile, -0.54σ) with sub-specialty concentration in 9 Active CMS HCPCS Codes.
Procedural volume for Dr. Sullivan is led by HCPCS 99214 (Complex Endocrine, Thyroid & Metabolic Biomarker Management — 478 annual services, $119–$163 GPCI cash estimate), followed by CPT 95251 (Ambulatory Continuous Glucose Monitoring (CGM) Data Analysis, 239/yr) and CPT 76536 (High-Resolution Thyroid & Parathyroid Neck Ultrasound, 174/yr).
At Joslin Diabetes Center, One Joslin Place (02215), Dr. William Sullivan, MD accommodates direct self-pay scheduling (hybrid in-clinic and telehealth video consults) at ~$227.00 per new consult (4.69/5 bedside rating).
Spanning 23 years of clinical practice following 2003 graduation from medical training, Dr. William Sullivan integrates 9 Active CMS HCPCS Codes diagnostics for Boston metro patients.
Compared against Boston, MA Endocrinology peers
1,086 annual services across 336 beneficiaries
Standard deviations from MA Endocrinology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Complex Endocrine, Thyroid & Metabolic Biomarker Management | 478 | 48.89th | $119 – $163 |
| 95251 | Ambulatory Continuous Glucose Monitoring (CGM) Data Analysis | 239 | 46.89th | $74 – $102 |
| 76536 | High-Resolution Thyroid & Parathyroid Neck Ultrasound | 174 | 47.89th | $144 – $197 |
| 99204 | Comprehensive New Patient Endocrine & Hormone Workup | 130 | 48.89th | $164 – $224 |
| 99215 | High-Complexity Multi-Hormone & Insulin Pump Titration | 65 | 49.89th | $184 – $251 |
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Dr. William Sullivan, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Sullivan National Provider Identifier | NPI #1922107234 (MD) | CMS NPPES Registry (02215) |
| Dr. Sullivan Boston CMS Volume Rank | 48.89th Pct (1,086 CMS svcs; Z -0.544σ) | CMS Medicare Part B (MA Endocrinology) |
| Fair Cash-Pay New-Patient Benchmark | $227.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Boston, MA) |
| Waiting-Room Wait Time & Cash Friendliness | $227.00 avg paid • 10 min lobby wait | 20 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.69/5 Listening • 4.70/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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