Dr. Mark Chang, MD
2428 Knob Creek Road, Johnson City, TN 37604 • +1-943-555-1265
Medical Education: Accredited U.S. Medical School (Class of 2017)
What This Doctor Actually Performs: CMS Medicare Utilization & Johnson City Percentiles
NPI #1174632475 • CBSA Regional • Cardiology
Dr. Mark Chang, MD (NPI #1174632475) practices Cardiology in Johnson City, TN (37604) with sub-specialty concentration in 52 Active CMS HCPCS Codes, recording 788 annual CMS services across 411 distinct beneficiaries—placing this practice as a focused low-volume boutique caseload (0th Johnson City percentile) (-0.36σ vs TN state mean, 3.2th statewide percentile).
Procedural volume for Dr. Chang is led by HCPCS 99214 (Established Cardiology Consultation & Hemodynamic Review — 299 annual services, $105–$144 GPCI cash estimate), followed by CPT 93000 (12-Lead Resting Electrocardiogram (ECG) w/ Interpretation, 221/yr) and CPT 93306 (Complete Transthoracic Echocardiography w/ Doppler & Color Flow, 142/yr).
Uninsured and high-deductible cash patients visiting Dr. Mark Chang in Johnson City (37604) face an estimated $201.00 initial evaluation fee at 2428 Knob Creek Road (hybrid in-clinic and telehealth video consults; 19-minute average reception wait; bedside manner 4.82/5 from 7 verified reports).
From 2428 Knob Creek Road in Johnson City (+1-943-555-1265), Dr. Chang, MD (9-year clinical track record) delivers 52 Active CMS HCPCS Codes care.
Compared against Johnson City, TN Cardiology peers
788 annual services across 411 beneficiaries
Standard deviations from TN Cardiology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Established Cardiology Consultation & Hemodynamic Review | 299 | 12th | $105 – $144 |
| 93000 | 12-Lead Resting Electrocardiogram (ECG) w/ Interpretation | 221 | 12th | $41 – $56 |
| 93306 | Complete Transthoracic Echocardiography w/ Doppler & Color Flow | 142 | 12th | $197 – $269 |
| 93224 | 24-Hour Ambulatory ECG Rhythm Monitoring & Analysis | 79 | 12th | $123 – $169 |
| 99204 | Comprehensive New Patient Cardiovascular Risk Evaluation | 47 | 12th | $151 – $207 |
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Dr. Mark Chang, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Chang National Provider Identifier | NPI #1174632475 (MD) | CMS NPPES Registry (37604) |
| Dr. Chang Johnson City CMS Volume Rank | 0.00th Pct (788 CMS svcs; Z -0.357σ) | CMS Medicare Part B (TN Cardiology) |
| Fair Cash-Pay New-Patient Benchmark | $201.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Johnson City, TN) |
| Waiting-Room Wait Time & Cash Friendliness | $201.00 avg paid • 19 min lobby wait | 7 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.82/5 Listening • 4.65/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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