Medicare Enrolled
Dr. Bill Chang, MD
Vascular Surgery Physician · Houston, TX
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Chang from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Chang
Dr. Bill Chang is a vascular surgery physician in Houston, TX, with 19 years of NPI registration. 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.
✓ 19 years in practice
▲ Top 14% volume in TX
$3,940 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,407
Medicare services
Top 14% in TX for vascular surgery physician
1,031
Unique beneficiaries
$204
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~74 Medicare services per year of practice
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) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
375 | $73 | $270 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
162 | $141 | $527 |
| Ultrasound of leg arteries or grafts An imaging test that uses sound waves to create pictures of the blood vessels in the legs or any surgical grafts present. |
100 | $189 | $729 |
| Ultrasound of arm and leg arteries A non-invasive imaging test that uses sound waves to examine the blood vessels in the arms and legs. It evaluates blood flow and checks for blockages or other vascular issues. |
96 | $82 | $389 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
84 | $11 | $107 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
84 | $131 | $501 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in the arm or leg. The test uses sound waves to check blood flow and may include compression and other maneuvers. |
46 | $145 | $573 |
| Arterial puncture or catheterization, arm or leg Insertion of a needle or tube into an artery in the arm or leg. This procedure is used to access the arterial system for diagnostic or therapeutic purposes. |
33 | $41 | $289 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
33 | $139 | $581 |
| Ultrasound of hemodialysis access An ultrasound imaging test used to evaluate the blood flow and structure of a hemodialysis access site. |
32 | $18 | $563 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
31 | $105 | $386 |
| Insertion of tunneled central venous catheter for infusion, age 5+ A surgical procedure to place a long-term catheter into a large vein for delivering medications or fluids. The catheter is tunneled under the skin to reduce infection risk and provide stable access for patients aged 5 and older. |
29 | $194 | $783 |
| Pre-operative ultrasound for hemodialysis access A complete ultrasound assessment of artery and vein blood flow performed before surgery to evaluate hemodialysis access. |
29 | $24 | $239 |
| Insertion of non-tunneled central venous catheter A procedure to place a central venous catheter for infusion in patients aged 5 years or older. The catheter is inserted directly into a large vein without being tunneled under the skin. |
27 | $68 | $255 |
| Fluoroscopic guidance for central vein access device Use of live X-ray imaging to guide the placement or removal of a central vein access device. |
27 | $14 | $305 |
| Radiologist review of abdominal aorta and leg artery images A radiologist reviews images of the abdominal aorta and the arteries in both legs. This process involves analyzing the visual data to assess the condition of these blood vessels. |
23 | $76 | $477 |
| Balloon dilation of leg artery A procedure to widen a narrowed or blocked artery in the leg using a balloon catheter to restore blood flow. |
21 | $232 | $1,695 |
| Arterial plaque removal in leg A procedure to remove plaque buildup from the arteries in the leg to restore blood flow. |
20 | $6,307 | $36,460 |
| Relocation of major arm vein to artery for hemodialysis A surgical procedure to move a large vein in the upper arm and connect it to an artery. This creates a vascular access point for hemodialysis treatment. |
19 | $509 | $2,709 |
| Hemodialysis circuit intervention with balloon dilation A procedure to insert a needle or tube into a hemodialysis circuit and dilate the dialysis segment using a balloon, with radiological review. |
18 | $182 | $897 |
| Radiologist review of arm or leg artery image A radiologist reviews images of the arteries in the arm or leg. This process involves analyzing the visual data to assess the blood vessels. |
18 | $117 | $801 |
| Needle or tube insertion into hemodialysis circuit with radiologist review A procedure involving the insertion of a needle or tube into a hemodialysis circuit, accompanied by a review of the procedure by a radiologist. |
17 | $101 | $616 |
| Hospital follow-up visit, low complexity Follow-up hospital visit for an established patient with straightforward or low-level medical decision making. The visit requires at least 25 minutes of time spent on the day of service. |
15 | $38 | $150 |
| Removal of tunneled central venous tube This procedure involves the removal of a catheter that has been surgically placed under the skin and threaded into a large vein. |
14 | $90 | $414 |
| Blood clot removal from hemodialysis graft This procedure involves the removal of a blood clot from a hemodialysis graft to restore proper blood flow for dialysis treatment. |
14 | $450 | $2,055 |
| Revision of hemodialysis graft A procedure to repair or restore the function of a surgically created blood vessel connection used for hemodialysis. |
14 | $571 | $2,990 |
| Balloon dilation of dialysis access with radiologist review A minimally invasive procedure to widen a narrowed section of a dialysis access vessel using a balloon catheter. The procedure includes review by a radiologist to ensure proper placement and effectiveness. |
13 | $114 | $516 |
| Balloon angioplasty of leg artery, initial vessel A procedure to widen a narrowed or blocked artery in the leg using a balloon catheter. This is performed on the first vessel treated during the session. |
13 | $412 | $1,625 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
6.3% high complexity
36.6% medium
57.1% routine
Industry Payment Transparency
Open Payments through 2024 ↗$3,940
Total received (2018-2024)
Avg $563/year across 7 years
Bottom 41% in TX for vascular surgery physician
21
Companies
92
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$3,940 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$307
2023
$1,430
2022
$437
2021
$108
2020
$185
2019
$1,123
2018
$350
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Silk Road Medical, Inc.
$998
Terumo Medical Corporation
$977
Medtronic, Inc.
$451
Medtronic Vascular, Inc.
$376
AngioDynamics, Inc.
$211
Janssen Pharmaceuticals, Inc
$189
Boston Scientific Corporation
$184
Tactile Systems Technology Inc
$93
Bard Peripheral Vascular, Inc.
$79
Philips Electronics North America Corporation
$75
Avinger Inc.
$54
Getinge USA Sales, LLC
$48
ABIOMED
$46
W. L. Gore & Associates, Inc.
$40
Cook Medical LLC
$20
Cardiovascular Systems Inc.
$20
Becton, Dickinson and Company
$20
BOSTON SCIENTIFIC CORPORATION
$17
SANOFI-AVENTIS U.S. LLC
$17
Sanara MedTech Inc.
$16
Musculoskeletal Transplant Foundation Inc.
$7
Top 3 companies account for 61.6% of total payments
Associated products mentioned in payments ›
3F · AURYON LASER SYSTEM 100-120 VAC · AZUR · CHAMELEON · CLOSUREFAST · CellerateRx · ClosureFast · ELLIPSYS VASCULAR ACCESS SYSTEM · ENROUTE Transcarotid Neuroprotection System · ENROUTE Transcarotid Stent · FLEXITOUCH · Flexitouch Plus · GORE EXCLUDER AAA Endoprosthesis · HAWKONE · HawkOne · IGT D Peripheral · IN.PACT ADMIRAL · IN.PACT AV · IN.PACT Admiral · Impella · LUTONIX · LUX DX · NanoCross · Navicross · PANTHERIS · Peripheral Orbital Atherectomy System · QT Vascular Chocolate PTA Balloon · RotarexS 6 F x 135 cm · TZIELD · VENASEAL · VERSASEAL · Varithena Administration Pack · Vasoview Hemopro 2 · VenaSeal · XARELTO · ZILVER PTX
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Equivalent to $280 per 100 Medicare services performed
Geographic Context
Vascular surgery physicians within 10 mi
32
Per 100K population
0.7
County median income
$73,104
Nearest hospital
HOUSTON METHODIST CLEAR LAKE HOSPITAL
0.0 mi
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), with low-engagement industry engagement, with 19 years of NPI registration.
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 (20-29 min)?
Based on Medicare claims data, Dr. Chang performed 375 office visit, established patient (20-29 min) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Chang receive payments from pharmaceutical companies?
Yes. Dr. Chang received a total of $3,940 from 21 companies across 92 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Chang's costs compare to other vascular surgery physicians in Houston?
Dr. Chang's average Medicare payment per service is $204. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Chang) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
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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