Dr. William Bayer, MD
501 Thornhill DR, Carol Stream, IL 60188 • +1-399-555-8904
Medical Education: Accredited U.S. Medical School (Class of 1999)
What This Doctor Actually Performs: CMS Medicare Utilization & Carol Stream Percentiles
NPI #1528162898 • CBSA Regional • Endocrinology
Dr. William Bayer, MD (NPI #1528162898) practices Endocrinology in Carol Stream, IL (60188) with sub-specialty concentration in 17 Active CMS HCPCS Codes, recording 12,532 annual CMS services across 575 distinct beneficiaries—placing this practice as a top-decile high-throughput specialist (99th percentile in Carol Stream) (+1.26σ vs IL state mean, 91.03th statewide percentile).
Medicare Part B line-item claims for Dr. William Bayer (60188) place 99214 at the top of the practice ledger (732 yearly units, 99th metro rank), rounded out by 95251 and 76536.
For out-of-network patients contacting +1-399-555-8904, Dr. Bayer's practice posts a $218.00 GPCI self-pay consult estimate ($218.00 patient-logged median, 4.82/5 composite reality score over 13 submissions).
Credentialed as an MD specialist with 27 years post-graduation experience since completing medical school at an LCME/COCA institution (1999), Dr. Bayer coordinates 17 Active CMS HCPCS Codes workups from 501 Thornhill DR (+1-399-555-8904).
Top 10% Endocrinology volume leader in Carol Stream, IL
12,532 annual services across 575 beneficiaries
Standard deviations from IL 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 | 732 | 99th | $53 – $73 |
| 95251 | Ambulatory Continuous Glucose Monitoring (CGM) Data Analysis | 366 | 99.5th | $33 – $48 |
| 76536 | High-Resolution Thyroid & Parathyroid Neck Ultrasound | 266 | 99.5th | $64 – $88 |
| 99204 | Comprehensive New Patient Endocrine & Hormone Workup | 200 | 96th | $73 – $100 |
| 99215 | High-Complexity Multi-Hormone & Insulin Pump Titration | 100 | 96th | $82 – $112 |
| 96372 | Therapeutic Subcutaneous/Intramuscular Injection Administration (17 HCPCS billing breadth) | 10,869 | 99th | $46 – $67 |
Are you Dr. William Bayer? Embed your Official DotMD Verification Badge (0-JS SVG)
Paste this lightweight SVG snippet onto your clinic bio page in Carol Stream, IL:
<a href="https://dotmd.com/doctors/william-bayer-md-carol-stream-il-1528162898" title="Dr. William Bayer, MD - Verified CMS Utilization on DotMD"><img src="https://dotmd.com/badges/npi/1528162898.svg" alt="Dr. William Bayer Endocrinology Badge" width="280" height="72" /></a>
Dr. William Bayer, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Bayer National Provider Identifier | NPI #1528162898 (MD) | CMS NPPES Registry (60188) |
| Dr. Bayer Carol Stream CMS Volume Rank | 99.00th Pct (12,532 CMS svcs; Z +1.265σ) | CMS Medicare Part B (IL Endocrinology) |
| Fair Cash-Pay New-Patient Benchmark | $218.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Carol Stream, IL) |
| Waiting-Room Wait Time & Cash Friendliness | $218.00 avg paid • 13 min lobby wait | 13 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.92/5 Listening • 4.74/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
Ask our AI Specialists anything about Dr. William Bayer
Dr. Bayer Waiting-Room Q&A & Patient Experience Logs
Anonymous patient-submitted wait times, cash visit fees, and bedside manner discussions in Carol Stream, IL.
Share your self-pay visit cost and lobby wait time—no account, email, or IP stored.
Filter Dr. William Bayer community threads and patient logs by age, biological sex, dosage, and treatment duration.