Dr. Lydia Chang, MD
130 Mason Farm Rd, Suite 4124, Chapel Hill, NC 27599 • +1-388-555-3348
Medical Education: Accredited U.S. Medical School (Class of 1994)
What This Doctor Actually Performs: CMS Medicare Utilization & Chapel Hill Percentiles
NPI #1972570141 • CBSA Regional • Pulmonary Disease
Operating out of Chapel Hill, NC (130 Mason Farm Rd, Suite 4124), Pulmonary Disease clinician Dr. Lydia Chang, MD (accredited MD/DO training, 1994) maintains a focused low-volume boutique caseload (25th Chapel Hill percentile) (34.62th NC percentile; Z-score -0.22σ across 1,080 documented services) with sub-specialty concentration in 31 Active CMS HCPCS Codes.
Procedural volume for Dr. Chang is led by HCPCS 99214 (Established Pulmonary, Asthma & COPD Management — 443 annual services, $154–$212 GPCI cash estimate), followed by CPT 94060 (Pre- & Post-Bronchodilator Spirometry Airflow Evaluation, 248/yr) and CPT 94729 (Alveolar Carbon Monoxide Diffusing Capacity (DLCO), 184/yr).
Self-pay new patient consultations with Dr. Chang (CPT 99204 GPCI-adjusted benchmark) estimate around $209.00 (community reported average: $209.00) with hybrid in-clinic and telehealth video consults, 11-minute average reception wait, and a 4.51/5 modern protocol openness score across 11 patient logs.
Spanning 32 years of clinical practice following 1994 graduation from medical training, Dr. Lydia Chang integrates 31 Active CMS HCPCS Codes diagnostics for Chapel Hill metro patients.
Compared against Chapel Hill, NC Pulmonary Disease peers
1,080 annual services across 355 beneficiaries
Standard deviations from NC Pulmonary Disease 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 Pulmonary, Asthma & COPD Management | 443 | 25th | $154 – $212 |
| 94060 | Pre- & Post-Bronchodilator Spirometry Airflow Evaluation | 248 | 26th | $101 – $138 |
| 94729 | Alveolar Carbon Monoxide Diffusing Capacity (DLCO) | 184 | 23th | $91 – $125 |
| 95810 | Attended Sleep Apnea Polysomnography Interpretation | 119 | 20th | $282 – $386 |
| 99204 | Comprehensive New Patient Respiratory & Sleep Workup | 86 | 22th | $217 – $298 |
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Dr. Lydia Chang, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Chang National Provider Identifier | NPI #1972570141 (MD) | CMS NPPES Registry (27599) |
| Dr. Chang Chapel Hill CMS Volume Rank | 25.00th Pct (1,080 CMS svcs; Z -0.223σ) | CMS Medicare Part B (NC Pulmonary Disease) |
| Fair Cash-Pay New-Patient Benchmark | $209.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Chapel Hill, NC) |
| Waiting-Room Wait Time & Cash Friendliness | $209.00 avg paid • 11 min lobby wait | 11 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.92/5 Listening • 4.51/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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