Dr. Teng Chang, MD
8199 Southpark Ln Ste 100, Littleton, CO 80120 • +1-892-555-6353
Medical Education: Accredited U.S. Medical School (Class of 1999)
What This Doctor Actually Performs: CMS Medicare Utilization & Littleton Percentiles
NPI #1255312328 • CBSA Regional • Internal Medicine
Operating out of Littleton, CO (8199 Southpark Ln Ste 100), Internal Medicine clinician Dr. Teng Chang, MD (accredited MD/DO training, 1999) maintains a mid-cohort balanced caseload (35.71th Littleton percentile) (54.88th CO percentile; Z-score -0.14σ across 1,415 documented services) with sub-specialty concentration in 33 Active CMS HCPCS Codes.
Dr. Chang's longitudinal care intensity (6.3 billed units per patient across 223 individuals) centers on 99214 (604 annual units) and 99213 ($81–$111 cash range).
For out-of-network patients contacting +1-892-555-6353, Dr. Chang's practice posts a $211.00 GPCI self-pay consult estimate ($211.00 patient-logged median, 4.66/5 composite reality score over 25 submissions).
Patients evaluating Dr. Teng Chang in ZIP 80120 note 27 years of post-doctoral tenure (null, 1999) alongside 6.3 annual CMS procedures per patient.
Compared against Littleton, CO Internal Medicine peers
1,415 annual services across 223 beneficiaries
Standard deviations from CO Internal Medicine mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Moderate-to-High Complexity Internal Medicine Follow-Up | 604 | 35.71th | $106 – $145 |
| 99213 | Established Preventive & Chronic Care Visit | 349 | 32.71th | $81 – $111 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 175 | 38.71th | $39 – $54 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 134 | 32.71th | $124 – $170 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 81 | 31.71th | $147 – $202 |
| 96372 | Therapeutic Subcutaneous/Intramuscular Injection Administration (33 HCPCS billing breadth) | 72 | 35.71th | $95 – $138 |
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Dr. Teng Chang, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Chang National Provider Identifier | NPI #1255312328 (MD) | CMS NPPES Registry (80120) |
| Dr. Chang Littleton CMS Volume Rank | 35.71th Pct (1,415 CMS svcs; Z -0.138σ) | CMS Medicare Part B (CO Internal Medicine) |
| Fair Cash-Pay New-Patient Benchmark | $211.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Littleton, CO) |
| Waiting-Room Wait Time & Cash Friendliness | $211.00 avg paid • 13 min lobby wait | 25 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.81/5 Listening • 4.58/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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