Dr. Karen Chang-Chen, MD
224 S Woods Mill Rd Ste 480s, Chesterfield, MO 63017 • +1-278-555-9381
Medical Education: Accredited U.S. Medical School (Class of 1992)
What This Doctor Actually Performs: CMS Medicare Utilization & Chesterfield Percentiles
NPI #1508916495 • CBSA Regional • Endocrinology
CMS Medicare Part B utilization records credit Dr. Karen Chang-Chen (MD, NPI 1508916495) at 224 S Woods Mill Rd Ste 480s in Chesterfield with 680 annual clinical services (310 beneficiaries), corresponding to a -0.40σ regional deviation and focused low-volume boutique caseload (0th Chesterfield percentile) with sub-specialty concentration in 13 Active CMS HCPCS Codes.
Granular CPT/HCPCS billing distribution at 224 S Woods Mill Rd Ste 480s shows Dr. Karen Chang-Chen's primary concentration in Complex Endocrine, Thyroid & Metabolic Biomarker Management (code 99214: 299x/yr, 12th local percentile) alongside Ambulatory Continuous Glucose Monitoring (CGM) Data Analysis (95251: 150x/yr, $96–$131).
Direct cash-pay transparency modeling sets Dr. Chang-Chen's baseline new-consult rate near $209.00 in Chesterfield, MO (cash-pay accepted, in-person clinic visits only, 22-minute average reception wait).
Credentialed as an MD specialist with 34 years post-graduation experience since completing medical school at an LCME/COCA institution (1992), Dr. Chang-Chen coordinates 13 Active CMS HCPCS Codes workups from 224 S Woods Mill Rd Ste 480s (+1-278-555-9381).
Compared against Chesterfield, MO Endocrinology peers
680 annual services across 310 beneficiaries
Standard deviations from MO 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 | 299 | 12th | $153 – $210 |
| 95251 | Ambulatory Continuous Glucose Monitoring (CGM) Data Analysis | 150 | 12th | $96 – $131 |
| 76536 | High-Resolution Thyroid & Parathyroid Neck Ultrasound | 109 | 12th | $185 – $254 |
| 99204 | Comprehensive New Patient Endocrine & Hormone Workup | 82 | 12th | $211 – $289 |
| 99215 | High-Complexity Multi-Hormone & Insulin Pump Titration | 41 | 12th | $236 – $324 |
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Dr. Karen Chang-Chen, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Chang-Chen National Provider Identifier | NPI #1508916495 (MD) | CMS NPPES Registry (63017) |
| Dr. Chang-Chen Chesterfield CMS Volume Rank | 0.00th Pct (680 CMS svcs; Z -0.399σ) | CMS Medicare Part B (MO Endocrinology) |
| Fair Cash-Pay New-Patient Benchmark | $209.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Chesterfield, MO) |
| Waiting-Room Wait Time & Cash Friendliness | $209.00 avg paid • 22 min lobby wait | 12 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.95/5 Listening • 4.82/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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