Dr. Robert Chang, MD
300 Pasteur DR, Stanford, CA 94305 • +1-710-555-6305
Medical Education: Accredited U.S. Medical School (Class of 1994)
What This Doctor Actually Performs: CMS Medicare Utilization & Stanford Percentiles
NPI #1417044280 • CBSA Regional • Ophthalmology
Within the Stanford, CA (CBSA local) Ophthalmology cohort, Dr. Robert Chang, MD with sub-specialty concentration in 50 Active CMS HCPCS Codes ranks at the 75th municipal percentile and 52.27th CA percentile (-0.29σ Z-score) based on 3,165 billed procedures for 752 patients.
Fee-schedule auditing of NPI 1417044280 highlights 1171 annual claims for 92014 (75th Stanford percentile; $209–$287 self-pay corridor) plus 823 encounters under 92134 and 538 under 92083.
Cash-pay intake data for NPI 1417044280 (300 Pasteur DR, Stanford) indicates $239.00 typical out-of-pocket visit spend against a $239.00 locality benchmark, paired with 16-minute average reception wait and 4.55/5 biomarker openness.
Clinical background for Dr. Chang (MD, NPI #1417044280) includes accredited doctoral training (1994, 32 yrs in practice) and virtual + in-office availability across CA.
Compared against Stanford, CA Ophthalmology peers
3,165 annual services across 752 beneficiaries
Standard deviations from CA Ophthalmology mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 92014 | Comprehensive Ophthalmologic Slit-Lamp & Dilated Retinal Exam | 1,171 | 75th | $209 – $287 |
| 92134 | Scanning Computerized Ophthalmic Retinal OCT Imaging | 823 | 72th | $115 – $158 |
| 92083 | Extended Threshold Visual Field Glaucoma Perimetry | 538 | 76th | $138 – $189 |
| 92004 | New Patient Complete Medical Eye & IOP Evaluation | 380 | 78th | $252 – $345 |
| 66984 | Extracapsular Cataract Removal w/ Intraocular Lens Implant | 253 | 72th | $921 – $1263 |
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Dr. Robert Chang, MD Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Chang National Provider Identifier | NPI #1417044280 (MD) | CMS NPPES Registry (94305) |
| Dr. Chang Stanford CMS Volume Rank | 75.00th Pct (3,165 CMS svcs; Z -0.290σ) | CMS Medicare Part B (CA Ophthalmology) |
| Fair Cash-Pay New-Patient Benchmark | $239.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Stanford, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $239.00 avg paid • 16 min lobby wait | 20 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.96/5 Listening • 4.55/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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