Medicare Enrolled
Dr. Michael Isaac, M.D.
Cardiovascular Disease · Dallas, TX
Practice pattern: Cardiac & Electrophysiology
— Practice combining cardiac and electrophysiology services
Speaking/Promotional
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. Isaac 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. Isaac
Dr. Michael Isaac is a cardiovascular disease specialist in Dallas, TX, with 19 years of NPI registration. Based on federal Medicare data, Dr. Isaac performed 9,241 Medicare services across 6,182 unique beneficiaries.
Between the years covered by Open Payments, Dr. Isaac received a total of $106,921 from 54 pharmaceutical and/or device companies across 476 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in cardiovascular disease. 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. Isaac 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 4% volume in TX
$106,921 industry payments
Medicare Practice Summary
Medicare Utilization ↗9,241
Medicare services
Top 4% in TX for cardiovascular disease
6,182
Unique beneficiaries
$68
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~486 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 (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. |
1,897 | $86 | $238 |
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
1,013 | $42 | $199 |
| 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. |
617 | $130 | $704 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
596 | $129 | $729 |
| Remote pacemaker/defibrillator monitoring, 90 days Remote evaluation of a pacemaker or implantable defibrillator system within 90 days of the last check. |
538 | $15 | $84 |
| 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. |
531 | $10 | $51 |
| Remote monitoring of implantable heart device, up to 30 days Remote evaluation of an implanted heart or blood vessel monitoring system over a period of up to 30 days. |
367 | $18 | $95 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while monitoring the electrocardiogram under physician supervision and review. |
351 | $47 | $258 |
| 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. |
327 | $21 | $109 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
327 | $64 | $212 |
| 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. |
281 | $6 | $30 |
| Technetium Tc-99m tetrofosmin diagnostic injection A diagnostic injection of Technetium Tc-99m tetrofosmin used for imaging studies. |
264 | $50 | $525 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
251 | $55 | $301 |
| 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. |
249 | $327 | $1,599 |
| 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. |
214 | $24 | $181 |
| Anticoagulant management for warfarin Management of anticoagulant therapy for a patient taking warfarin. This service involves monitoring and adjusting the medication regimen. |
207 | $7 | $41 |
| Programming of multiple lead implantable defibrillator system Adjustment and testing of the settings for an implanted heart device with multiple leads to ensure proper function. |
106 | $74 | $398 |
| 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. |
104 | $9 | $128 |
| Evaluation of implantable heart and blood vessel monitoring system This procedure involves checking the function and data of an implanted device used to monitor heart and blood vessel activity. |
103 | $33 | $205 |
| 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. |
100 | $4 | $26 |
| Programming of dual lead implantable defibrillator system Adjustment and testing of the settings for an implanted heart device with two leads to ensure proper function. |
94 | $67 | $372 |
| 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. |
81 | $104 | $310 |
| Ultrasound of aorta, vena cava, groin vessels or bypass grafts This procedure uses sound waves to create images of the aorta, vena cava, groin vessels, or bypass grafts. It allows for the visualization of these blood vessels and any surgical grafts. |
73 | $62 | $431 |
| Cardiac catheterization | 54 | $177 | $1,035 |
| 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. |
53 | $127 | $517 |
| Heart muscle strain imaging | 50 | $28 | $139 |
| 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. |
43 | $87 | $268 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
37 | $19 | $361 |
| Pacemaker system programming Adjustment and testing of a multi-lead pacemaker to ensure proper function and settings. |
36 | $59 | $317 |
| Coronary stent placement A procedure to insert a stent into a coronary artery or its branch to keep it open, using balloon dilation during the process. |
35 | $360 | $2,057 |
| 3D radiographic procedure A radiographic imaging technique that creates three-dimensional representations of internal structures. |
34 | $7 | $227 |
| Perflutren lipid microspheres injection Injection of perflutren lipid microspheres, measured per milliliter. |
28 | $35 | $358 |
| Pacemaker programming, single lead Adjustment and testing of a single-lead pacemaker to ensure it functions correctly. |
23 | $47 | $253 |
| Aminophylline injection, up to 250 mg Administration of aminophylline medication via injection for a dose of up to 250 mg. |
23 | $5 | $12 |
| Echocardiogram with color Doppler An ultrasound of the heart that uses color imaging to visualize blood flow, measure flow rate, and assess valve function. |
22 | $2 | $28 |
| Pacemaker insertion with heart chamber electrodes A surgical procedure to implant a pacemaker device and place electrodes into the upper and lower chambers of the heart to regulate heart rhythm. |
20 | $376 | $1,984 |
| Routine 12-lead electrocardiogram (ECG) A test that records the electrical activity of the heart using at least 12 leads to produce a tracing. |
20 | $5 | $48 |
| Insertion of tube in left lower heart chamber, coronary artery and bypass graft for diagnosis with review by radiologist | 18 | $181 | $1,175 |
| Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts A complete ultrasound exam of the aorta, vena cava, groin vessels, or bypass grafts. This imaging test uses sound waves to visualize these blood vessels. |
15 | $133 | $664 |
| Complete ultrasound of abdomen and pelvis blood flow This procedure uses sound waves to create images of blood flow in the arteries and veins of the abdomen and pelvis. It evaluates the rate and direction of blood movement within these vessels. |
14 | $184 | $979 |
| Follow-up ultrasound of heart blood flow, valves and chambers An ultrasound exam that follows up on the heart's blood flow, valves, and chambers. It uses sound waves to create images of the heart's structure and function. |
13 | $5 | $155 |
| Ultrasound of arm and leg arteries This procedure uses sound waves to create images of the blood vessels in the arms and legs. It allows healthcare providers to examine the structure and blood flow within these arteries. |
12 | $47 | $299 |
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.
26.1% high complexity
29.0% medium
44.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$106,921
Total received (2018-2024)
Avg $15,274/year across 7 years
Top 5% in TX for cardiovascular disease
54
Companies
476
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.
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$93,711 (87.6%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$6,711 (6.3%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$6,499 (6.1%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,163
2023
$1,248
2022
$5,681
2021
$4,071
2020
$10,575
2019
$43,528
2018
$40,654
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Medtronic Vascular, Inc.
$83,840
Medtronic, Inc.
$8,108
Abbott Laboratories
$6,600
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$2,029
SANOFI-AVENTIS U.S. LLC
$685
Amgen Inc.
$559
Novartis Pharmaceuticals Corporation
$503
Merck Sharp & Dohme LLC
$332
Janssen Pharmaceuticals, Inc
$307
PFIZER INC.
$255
Boehringer Ingelheim Pharmaceuticals, Inc.
$250
Boston Scientific Corporation
$237
Invuity, Inc.
$232
Regeneron Healthcare Solutions, Inc.
$201
Kiniksa Pharmaceuticals International, plc
$192
Impulse Dynamics (USA) Inc.
$169
AstraZeneca Pharmaceuticals LP
$162
HeartFlow, Inc.
$146
CVRx, Inc.
$144
Astellas Pharma US Inc
$141
Gilead Sciences, Inc.
$136
Daxor Corporation
$124
Esperion Therapeutics, Inc.
$123
Novo Nordisk Inc
$116
BOSTON SCIENTIFIC CORPORATION
$111
Tactile Systems Technology Inc
$100
Amarin Pharma Inc.
$92
ABIOMED
$91
Itamar Medical Inc
$89
Innovation Technologies Inc
$79
CARDIVA MEDICAL, INC.
$69
Cardiovascular Systems Inc.
$67
SCPHARMACEUTICALS INC.
$67
iRhythm Technologies, Inc.
$65
E.R. Squibb & Sons, L.L.C.
$55
Chiesi USA, Inc.
$43
ARALEZ PHARMACEUTICALS US INC.
$40
Bardy Diagnostics, Inc.
$36
ACIST MEDICAL SYSTEMS, INC.
$33
Lexicon Pharmaceuticals, Inc.
$33
MEDICOMP INC
$31
HEARTFLOW, INC.
$30
Avinger Inc.
$25
BIOTRONIK INC.
$23
Philips Electronics North America Corporation
$22
Actelion Pharmaceuticals US, Inc.
$19
Merck Sharp & Dohme Corporation
$17
AngioDynamics, Inc.
$15
Cardinal Health 200, LLC
$15
Medtronic USA, Inc.
$13
G Medical Diagnostic Services, Inc.
$13
GE HEALTHCARE
$13
Allergan Inc.
$11
Hitachi Healthcare Americas Corp.
$11
Top 3 companies account for 92.2% of total payments
Associated products mentioned in payments ›
AQUAMANTYS · AZURE XT DR MRI SURESCAN · Advisa · Allure Quadra RF CRT Pacemaker · Amplia MRI · AngioVac · Arcalyst · Assurity Pacemaker · Azure · BRILINTA · BVA-100 · BYSTOLIC · Barostim Neo System · CAMZYOS · CARDENE · CARDIOMEMS · CHANTIX · COBALT DR MRI SURESCAN · CONFIRM RX · CRT-Ds · CVI SYSTEMS · Cardiac Monitoring Suite · CardioMEMS HF System · Carnation Ambulatory Monitor · Claria MRI · Cobalt · Corlanor · ELIQUIS · EMBLEM · ENTRESTO · Evera · FARXIGA · FFRct · FUROSCIX · Flexitouch Plus · GENERAL TACHY · GENERAL THERAPIES · GENERAL VASCULAR INTERVENTION · GENERAL - THERAPIES · GENERAL PAIN MANAGEMENT · GENERAL THERAPIES · IGT D Coronary · IRRISEPT · Impella · Irrisept · JARDIANCE · JOT DX · KENGREAL · LEQVIO · LEXISCAN · LifeVest · MICRA · MULTAQ · MYNX CONTROLTM · Micra · Mitra Clip system · MyCareLink · NEXLETOL · NEXLIZET · OPTIMIZER · Optimizer · Ozempic · PRADAXA · PRALUENT · PRALUENT ALIROCUMAB INJECTION · PREVNAR 20 · Pacemakers · Peripheral Orbital Atherectomy System · Photonblade · QT Vascular Chocolate PTA Balloon · Quadra Assura CRT Defibrillator · RYBELSUS · Repatha · Resolute · Reveal LINQ · Rybelsus · SelectSecure · TELEPATCH CARDIAC MONITOR · TYRX · Telescope · UPTRAVI · VERQUVO · VYNDAMAX · VYNDAQEL · Vascepa · Vascular Closure Device · Visia AF · WATCHMAN Access System · WatchPAT · WatchPATONE · XARELTO · ZIO XT Patch · ZONTIVITY
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 →
The majority of payments (88%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in cardiovascular disease and does not inherently indicate bias, but patients may wish to be aware. Total industry engagement is in the top 5% for cardiovascular disease in TX.
Equivalent to $1,157 per 100 Medicare services performed
Geographic Context
Cardiologists within 10 mi
312
Per 100K population
12.0
County median income
$74,149
Nearest hospital
MEDICAL CITY DALLAS 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. Isaac is a cardiac & electrophysiology specialist, with above-average Medicare volume (top 4% in TX), with speaking/promotional industry engagement in the top 5% of TX peers, 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. Isaac experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Isaac performed 1,897 office visit, established patient (30-39 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. Isaac receive payments from pharmaceutical companies?
Yes. Dr. Isaac received a total of $106,921 from 54 companies across 476 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. Isaac's costs compare to other cardiologists in Dallas?
Dr. Isaac's average Medicare payment per service is $68. 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. Isaac) 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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