Dr. Peter Chang, M.D.
What this data tells you about Dr. Chang
Dr. Peter Chang is a glaucoma specialist (ophthalmology) physician in Houston, TX, with 20 years in practice. Based on federal Medicare data, Dr. Chang performed 3,374 Medicare services across 2,496 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chang received a total of $552,262 from 32 pharmaceutical and/or device companies across 1128 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in glaucoma 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 |
|---|---|---|---|
| Office visit, established patient (30-39 min) | 877 | $90 | $354 |
| Visual field test, extended | 590 | $45 | $173 |
| Optic nerve imaging (OCT scan) | 449 | $27 | $102 |
| Injection, bimatoprost, intracameral implant, 1 microgram | 280 | $160 | $585 |
| Office visit, established patient (20-29 min) | 276 | $61 | $250 |
| Comprehensive eye exam, established patient | 165 | $79 | $348 |
| Retinal photography (fundus photo) | 140 | $26 | $130 |
| Exam of the internal drainage system of eye | 93 | $22 | $77 |
| Ultrasound scan to determine eye length and lens power | 82 | $33 | $131 |
| New patient office visit (45-59 min) | 66 | $116 | $461 |
| Ultrasound scan of cornea to determine thickness | 64 | $9 | $32 |
| Laser repair to improve eye fluid flow | 61 | $188 | $1,238 |
| Cataract surgery with lens implant | 36 | $353 | $2,707 |
| Injection of medication into eye | 28 | $146 | $909 |
| Removal of recurring cataract in lens capsule using a laser | 24 | $244 | $1,671 |
| Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye | 21 | $516 | $3,395 |
| Insertion of drug delivery implant into tear duct of eye | 21 | $15 | $163 |
| Insertion of eye fluid drainage device | 19 | $836 | $5,124 |
| Creation of shunt to improve eye fluid flow using tissue graft | 18 | $889 | $5,668 |
| Retinal imaging (OCT scan) | 18 | $30 | $112 |
| Dilation of fluid outflow drainage within eye | 17 | $326 | $3,106 |
| Corneal topography and eye depth measurement | 17 | $25 | $83 |
| Incision to improve eye fluid flow | 12 | $673 | $4,126 |
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 (90%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in glaucoma specialist (ophthalmology) physician and does not inherently indicate bias, but patients may wish to be aware. Total industry engagement is in the top 0% for glaucoma specialist (ophthalmology) physician in TX.
Geographic Context
0.0 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 clinical cardiology specialist, with above-average Medicare volume (top 22% in TX), and high industry engagement (speaking/promotional, top 0%), with 20 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 office visit, established patient (30-39 min)?
Does Dr. Chang receive payments from pharmaceutical companies?
How do Dr. Chang's costs compare to other glaucoma specialist (ophthalmology) physicians in Houston?
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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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