Medicare Enrolled
Dr. Ren Zhang, M.D.
Cardiovascular Disease · Abilene, 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. Zhang 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. Zhang
Dr. Ren Zhang is a cardiovascular disease specialist in Abilene, TX, with 20 years of NPI registration. Based on federal Medicare data, Dr. Zhang performed 9,006 Medicare services across 5,200 unique beneficiaries.
Between the years covered by Open Payments, Dr. Zhang received a total of $13,871 from 32 pharmaceutical and/or device companies across 448 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in cardiovascular disease. 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. Zhang 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.
✓ 20 years in practice
▲ Top 4% volume in TX
$13,871 industry payments
Medicare Practice Summary
Medicare Utilization ↗9,006
Medicare services
Top 4% in TX for cardiovascular disease
5,200
Unique beneficiaries
$33
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~450 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 |
|---|---|---|---|
| Anticoagulant management for warfarin Management of anticoagulant therapy for a patient taking warfarin. This service involves monitoring and adjusting the medication regimen. |
1,820 | $7 | $34 |
| Prothrombin time test (blood clotting) A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process. |
1,711 | $4 | $22 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
933 | $52 | $334 |
| 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. |
439 | $76 | $365 |
| CT scan of heart blood vessels and grafts with contrast A CT scan that uses contrast dye to create detailed images of the heart's blood vessels and any surgical grafts. |
332 | $86 | $330 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
267 | $90 | $341 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while monitoring the electrocardiogram, with physician review of the results. |
260 | $10 | $41 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
259 | $9 | $43 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
252 | $60 | $227 |
| Nuclear stress test of heart muscle A nuclear medicine imaging test that evaluates blood flow to the heart muscle at rest and during stress using a special camera. |
246 | $57 | $221 |
| Transesophageal echocardiogram An ultrasound of the heart performed using a probe inserted into the esophagus to obtain detailed images of heart structures and function. |
221 | $80 | $507 |
| Echocardiogram, transthoracic An ultrasound test that uses sound waves to create images of the heart's blood flow, valves, and chambers. |
218 | $14 | $98 |
| Echocardiogram with color Doppler An ultrasound of the heart that uses color imaging to visualize blood flow, measure flow rate, and assess valve function. |
218 | $2 | $38 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while an electrocardiogram is monitored under physician supervision. |
183 | $16 | $61 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
175 | $9 | $143 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
168 | $19 | $173 |
| Transesophageal echocardiogram during heart surgery An ultrasound of the heart performed using a probe inserted into the esophagus while surgery on the heart or major blood vessels is taking place, including a written report. |
166 | $169 | $637 |
| 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. |
138 | $28 | $263 |
| Remote pacemaker monitoring, 90 days Remote assessment of a pacemaker system, including single, dual, multiple lead, or leadless devices, performed up to 90 days apart. |
128 | $22 | $86 |
| 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. |
107 | $130 | $500 |
| CT coronary angiography data analysis Review of CT scan data to assess the severity of heart artery disease and examine anatomical details. |
86 | $53 | $103 |
| Continuous EKG monitoring review, 48-7 days Review and interpretation of continuous external EKG recordings lasting more than 48 hours up to 7 days. |
70 | $18 | $68 |
| 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. |
63 | $52 | $257 |
| Pacemaker system evaluation Assessment of a pacemaker device, including single, dual, multiple lead, or leadless systems. |
61 | $15 | $99 |
| 3D radiographic procedure with computerized image postprocessing A radiographic imaging procedure that creates three-dimensional images using computerized processing of the captured data. |
57 | $29 | $111 |
| 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. |
50 | $29 | $383 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in one arm or leg using compression and other maneuvers to assess blood flow and check for blockages. |
37 | $16 | $106 |
| Remote evaluation of implantable defibrillator system Remote assessment of a single, dual, or multiple lead implantable defibrillator system within 90 days of the previous evaluation. |
36 | $27 | $108 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
35 | $122 | $509 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
34 | $17 | $66 |
| EKG interpretation and report A standard electrocardiogram test that records the heart's electrical activity using at least 12 leads. The service includes a professional interpretation of the results and a written report. |
33 | $5 | $24 |
| 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. |
28 | $25 | $268 |
| 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. |
28 | $94 | $491 |
| CT scan of heart for calcium evaluation A CT scan of the heart used to evaluate calcium levels in the blood vessels. |
27 | $21 | $81 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
22 | $25 | $176 |
| Implantable defibrillator system check A check of the implanted defibrillator device to ensure it is functioning correctly. This evaluation covers single, dual, or multiple lead systems. |
21 | $27 | $105 |
| Hospital discharge day management, 30 minutes or less This service covers the final day of hospital care when the patient is being discharged. It includes coordination of care and instructions for the patient within a time frame of 30 minutes or less. |
20 | $62 | $231 |
| CT scan of heart with contrast A computed tomography scan that uses contrast dye to create detailed images of the heart's structure. |
18 | $64 | $238 |
| External shock to heart to regulate heart beat A procedure that delivers an electric shock to the heart from outside the body to restore a normal heart rhythm. |
13 | $82 | $425 |
| 2-day continuous ECG with professional review A two-day continuous electrocardiogram recording that includes a review by a healthcare professional. |
13 | $14 | $53 |
| Ultrasound of leg arteries or grafts An ultrasound exam that uses sound waves to create images of the arteries in one leg or any grafts present in that leg. |
13 | $16 | $65 |
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.
17.6% high complexity
21.5% medium
60.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$13,871
Total received (2018-2024)
Avg $1,982/year across 7 years
Top 25% in TX for cardiovascular disease
32
Companies
448
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
$12,405 (89.4%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$1,465 (10.6%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$2,879
2023
$3,103
2022
$728
2021
$709
2020
$646
2019
$3,967
2018
$1,839
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Boston Scientific Corporation
$2,624
Abbott Laboratories
$1,643
HEARTFLOW, INC.
$1,131
Siemens Medical Solutions USA, Inc.
$1,062
Janssen Pharmaceuticals, Inc
$965
Novartis Pharmaceuticals Corporation
$864
AstraZeneca Pharmaceuticals LP
$850
FUJIFILM Medical Systems USA, Inc.
$824
Amgen Inc.
$768
HeartFlow, Inc.
$619
E.R. Squibb & Sons, L.L.C.
$358
Edwards Lifesciences Corporation
$317
PFIZER INC.
$278
Amarin Pharma Inc.
$220
SANOFI-AVENTIS U.S. LLC
$174
Medtronic, Inc.
$154
ABIOMED
$121
United Therapeutics Corporation
$117
Actelion Pharmaceuticals US, Inc.
$110
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$100
GE HEALTHCARE
$97
CathWorks, Inc.
$93
Medtronic Vascular, Inc.
$72
Pfizer Inc.
$69
Merck Sharp & Dohme LLC
$66
Gilead Sciences, Inc.
$63
Otsuka America Pharmaceutical, Inc.
$39
Braemar Manufacturing, LLC
$21
Merck Sharp & Dohme Corporation
$16
Covidien LP
$14
Boehringer Ingelheim Pharmaceuticals, Inc.
$13
Cook Medical LLC
$11
Top 3 companies account for 38.9% of total payments
Associated products mentioned in payments ›
2ND GEN CENTRIMAG PRIMARY CONSOLE · ACUSON SC2000 Diagnostic Ultrasound System · AMPLATZER AMULET · BELSOMRA · BRILINTA · CARDIOMEMS · CHANTIX · Cardiac Monitoring Suite · Claria MRI · Cook Medical Zilver PTX · Corlanor · ELIQUIS · ENTRESTO · Edwards SAPIEN 3 Transcatheter Heart Valve · FARXIGA · FFRANGIO · FFRct · HeartMate 3 Left Ventricular Dev · Impella · JETI PERIPHERAL CATHETER · LEQVIO · LifeVest · LigaSure · MULTAQ · ORENITRAM · PRADAXA · PRALUENT · PROCLAIM · REXULTI · Repatha · SAPIEN 3 Ultra RESILIA · SIGNIA · Synapse PACS (MI) · THORATEC HEARTMATE 3 LVAS IMPLANT KIT · UPTRAVI · VERQUVO · VYNDAQEL · Vascepa · WATCHMAN · WATCHMAN Access System · WATCHMAN FLX · XARELTO
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 (89%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Equivalent to $154 per 100 Medicare services performed
Geographic Context
Cardiologists within 10 mi
11
Per 100K population
55.1
County median income
$63,472
Nearest hospital
HENDRICK MEDICAL CENTER
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. Zhang is a clinical cardiology specialist, with above-average Medicare volume (top 4% in TX), with low-engagement industry engagement, with 20 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. Zhang experienced with anticoagulant management for warfarin?
Based on Medicare claims data, Dr. Zhang performed 1,820 anticoagulant management for warfarin 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. Zhang receive payments from pharmaceutical companies?
Yes. Dr. Zhang received a total of $13,871 from 32 companies across 448 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. Zhang's costs compare to other cardiologists in Abilene?
Dr. Zhang's average Medicare payment per service is $33. 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. Zhang) 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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