Dr. Emmanuel Chang, MD/PHD
What this data tells you about Dr. Chang
Dr. Emmanuel Chang is a retina specialist (ophthalmology) physician in Bellaire, TX, with 17 years in practice. Based on federal Medicare data, Dr. Chang performed 50,533 Medicare services across 3,058 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chang received a total of $255,870 from 23 pharmaceutical and/or device companies across 393 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in retina specialist (ophthalmology) physician. The majority of payments are for speaking programs and promotional activities, reflecting participation in industry-sponsored events. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Chang is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Eye injection (Vabysmo/faricimab) | 43,560 | $29 | $93 |
| Retinal imaging (OCT scan) | 1,650 | $30 | $100 |
| Office visit, established patient (30-39 min) | 1,230 | $85 | $318 |
| Extended exam of the back part of the eye with optic nerve drawing | 924 | $12 | $39 |
| Eye injection for retinal disease | 893 | $99 | $333 |
| Aflibercept eye injection (Eylea) | 758 | $685 | $987 |
| Extended exam of the back part of the eye with retinal drawing | 395 | $19 | $62 |
| Comprehensive eye exam, established patient | 257 | $98 | $312 |
| Injection, ranibizumab, 0.1 mg | 240 | $188 | $413 |
| 2d ultrasound scan of eye tissue and structures | 210 | $36 | $112 |
| Exam of retinal blood vessels using a special camera after injection of a dye | 142 | $97 | $336 |
| New patient office visit (45-59 min) | 89 | $115 | $418 |
| Retinal photography (fundus photo) | 54 | $28 | $93 |
| Injection, bevacizumab, 10 mg | 54 | $56 | $85 |
| Office visit, established patient, complex (40-54 min) | 30 | $124 | $456 |
| Complex repair of detached retina and drainage of eye fluid between lens and retina | 17 | $1,047 | $3,381 |
| New patient office visit, complex (60-74 min) | 17 | $151 | $554 |
| Exam of retinal blood vessels and blood vessels between the white part of eye and retina using a special camera after injection of a dye | 13 | $195 | $666 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
Associated products mentioned in payments ›
The majority of payments (70%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in retina specialist (ophthalmology) physician and does not inherently indicate bias, but patients may wish to be aware. Total industry engagement is in the top 6% for retina specialist (ophthalmology) physician in TX.
Geographic Context
1.2 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Chang is a mixed practice specialist, with above-average Medicare volume (top 3% in TX), and high industry engagement (speaking/promotional, top 6%), with 17 years of practice experience.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. Chang experienced with eye injection (vabysmo/faricimab)?
Does Dr. Chang receive payments from pharmaceutical companies?
How do Dr. Chang's costs compare to other retina specialist (ophthalmology) physicians in Bellaire?
What does Data Coverage mean?
Is this data up to date?
Explore related providers
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. The Transparency Score measures data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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