Dr. Bill Chang, MD
What this data tells you about Dr. Chang
Dr. Bill Chang is a vascular surgery physician in Houston, TX, with 19 years in practice. Based on federal Medicare data, Dr. Chang performed 1,407 Medicare services across 1,031 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chang received a total of $3,940 from 21 pharmaceutical and/or device companies across 92 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in vascular surgery physician. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. 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 (20-29 min) | 375 | $73 | $270 |
| Initial hospital admission, high complexity | 162 | $141 | $527 |
| Ultrasound of leg arteries or artery grafts | 100 | $189 | $729 |
| Complete ultrasound study of arm and leg arteries | 96 | $82 | $389 |
| Ultrasonic guidance for blood vessel access | 84 | $11 | $107 |
| New patient office visit (45-59 min) | 84 | $131 | $501 |
| Ultrasound study of arm or leg veins with compression and maneuvers | 46 | $145 | $573 |
| Insertion of needle or tube into artery of arm or leg | 33 | $41 | $289 |
| Ultrasound of both sides of head and neck blood flow | 33 | $139 | $581 |
| Ultrasound of hemodialysis access | 32 | $18 | $563 |
| Office visit, established patient (30-39 min) | 31 | $105 | $386 |
| Insertion of tunneled central venous tube for infusion (5 years or older) | 29 | $194 | $783 |
| Complete ultrasound of artery and vein blood flow pre-op assessment on side of body for hemodialysis access | 29 | $24 | $239 |
| Insertion of non-tunneled central venous tube for infusion (5 years or older) | 27 | $68 | $255 |
| Fluoroscopic guidance for insertion or removal of central vein access device | 27 | $14 | $305 |
| Review by radiologist of abdominal aorta and both leg arteries image | 23 | $76 | $477 |
| Balloon dilation of artery of leg | 21 | $232 | $1,695 |
| Removal of plaque in arteries of leg | 20 | $6,307 | $36,460 |
| Relocation of major upper arm vein with connection to arm artery for hemodialysis | 19 | $509 | $2,709 |
| Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist | 18 | $182 | $897 |
| Review by radiologist of arm or leg artery image | 18 | $117 | $801 |
| Insertion of needle and/or tube into hemodialysis circuit with review by radiologist | 17 | $101 | $616 |
| Hospital follow-up visit, low complexity | 15 | $38 | $150 |
| Removal of tunneled central venous tube | 14 | $90 | $414 |
| Removal of blood clot from hemodialysis graft | 14 | $450 | $2,055 |
| Revision of hemodialysis graft | 14 | $571 | $2,990 |
| Balloon dilation of dialysis segment with review by radiologist | 13 | $114 | $516 |
| Balloon dilation of artery of leg, initial vessel | 13 | $412 | $1,625 |
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 ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
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 14% in TX), and low-engagement industry engagement, with 19 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
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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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