Medicare Enrolled
Dr. Marcus Cox, MD
Cardiovascular Disease · Jacksonville Beach, FL
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
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. Cox 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. Cox
Dr. Marcus Cox is a cardiovascular disease specialist in Jacksonville Beach, FL, with 18 years of NPI registration. Based on federal Medicare data, Dr. Cox performed 5,330 Medicare services across 4,260 unique beneficiaries.
Between the years covered by Open Payments, Dr. Cox received a total of $68,774 from 52 pharmaceutical and/or device companies across 463 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. Cox 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.
✓ 18 years in practice
▲ Top 19% volume in FL
$68,774 industry payments
Medicare Practice Summary
Medicare Utilization ↗5,330
Medicare services
Top 19% in FL for cardiovascular disease
4,260
Unique beneficiaries
$62
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~296 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. |
1,542 | $91 | $320 |
| 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. |
356 | $91 | $260 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
297 | $59 | $377 |
| 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. |
258 | $16 | $55 |
| 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. |
258 | $11 | $37 |
| Anticoagulant management for warfarin Management of anticoagulant therapy for a patient taking warfarin. This service involves monitoring and adjusting the medication regimen. |
239 | $8 | $29 |
| 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. |
215 | $58 | $195 |
| 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. |
214 | $10 | $69 |
| 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. |
200 | $6 | $26 |
| Echocardiogram with color Doppler An ultrasound of the heart that uses color imaging to visualize blood flow, measure flow rate, and assess valve function. |
179 | $2 | $8 |
| 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. |
140 | $4 | $11 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
133 | $100 | $343 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
132 | $19 | $63 |
| 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. |
130 | $113 | $423 |
| Transesophageal echocardiogram An ultrasound of the heart performed using a probe inserted into the esophagus to obtain detailed images of heart structures and function. |
128 | $81 | $272 |
| Echocardiogram, transthoracic An ultrasound test that uses sound waves to create images of the heart's blood flow, valves, and chambers. |
124 | $14 | $45 |
| 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. |
115 | $166 | $441 |
| 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. |
108 | $133 | $503 |
| 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. |
106 | $221 | $517 |
| 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. |
74 | $60 | $184 |
| 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. |
54 | $6 | $19 |
| 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. |
49 | $82 | $391 |
| Continuous ECG monitoring, up to 30 days Continuous heart rhythm monitoring for up to 30 days, including professional review and reporting of the results. |
49 | $20 | $66 |
| 2-day continuous ECG with professional review A two-day continuous electrocardiogram recording that includes a review by a healthcare professional. |
47 | $12 | $47 |
| Stress echocardiogram An ultrasound of the heart performed while at rest and during exercise or drug-induced stress to evaluate heart function under different conditions. |
26 | $50 | $175 |
| 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. |
23 | $16 | $56 |
| 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. |
22 | $25 | $88 |
| 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. |
20 | $44 | $143 |
| Ultrasound of leg arteries at rest and after exercise This test uses sound waves to create images of the blood vessels in the legs while the patient is resting and after physical activity to assess blood flow. |
19 | $18 | $65 |
| Heart muscle strain imaging | 18 | $8 | $94 |
| 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. |
17 | $132 | $454 |
| Continuous EKG monitoring review, 48-7 days Review and interpretation of continuous external EKG recordings lasting more than 48 hours up to 7 days. |
14 | $14 | $62 |
| 3D radiographic procedure A radiographic imaging technique that creates three-dimensional representations of internal structures. |
13 | $7 | $814 |
| Ultrasound of abdominal aorta An imaging test that uses sound waves to create pictures of the abdominal aorta, the large blood vessel that carries blood from the heart to the lower body. |
11 | $24 | $68 |
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.
8.9% high complexity
28.7% medium
62.4% routine
Industry Payment Transparency
Open Payments through 2024 ↗$68,774
Total received (2018-2024)
Avg $9,825/year across 7 years
Top 6% in FL for cardiovascular disease
52
Companies
463
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
$62,286 (90.6%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$6,489 (9.4%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,431
2023
$1,087
2022
$831
2021
$1,067
2020
$7,084
2019
$35,396
2018
$21,877
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Amarin Pharma Inc.
$40,968
Gilead Sciences, Inc.
$12,438
Janssen Pharmaceuticals, Inc
$9,509
Amgen Inc.
$734
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$607
AstraZeneca Pharmaceuticals LP
$381
SANOFI-AVENTIS U.S. LLC
$368
Allergan Inc.
$249
Boehringer Ingelheim Pharmaceuticals, Inc.
$247
E.R. Squibb & Sons, L.L.C.
$232
Medtronic Vascular, Inc.
$204
Novo Nordisk Inc
$191
ABIOMED
$185
CVRx, Inc.
$169
Esperion Therapeutics, Inc.
$162
PFIZER INC.
$152
Kiniksa Pharmaceuticals International, plc
$151
Abbott Laboratories
$151
Novartis Pharmaceuticals Corporation
$143
Regeneron Healthcare Solutions, Inc.
$105
Boston Scientific Corporation
$103
W. L. Gore & Associates, Inc.
$98
Actelion Pharmaceuticals US, Inc.
$95
Inari Medical, Inc.
$85
SCPHARMACEUTICALS INC.
$82
BIOTRONIK INC.
$76
Philips North America LLC
$71
ARBOR PHARMACEUTICALS, INC.
$64
Merck Sharp & Dohme LLC
$61
Lexicon Pharmaceuticals, Inc.
$56
Bayer Healthcare Pharmaceuticals Inc.
$46
Lilly USA, LLC
$46
Baxter Healthcare
$45
GENZYME CORPORATION
$42
Kowa Pharmaceuticals America, Inc.
$42
CONMED Corporation
$41
Impulse Dynamics (USA) Inc.
$40
Kiniksa Pharmaceuticals, Ltd.
$37
Bayer HealthCare Pharmaceuticals Inc.
$36
Merck Sharp & Dohme Corporation
$34
Alnylam Pharmaceuticals Inc.
$33
BOSTON SCIENTIFIC CORPORATION
$26
ShockWave Medical, Inc
$24
Otsuka America Pharmaceutical, Inc.
$19
Medtronic, Inc.
$19
ZOLL Respicardia, Inc.
$19
Relypsa, Inc.
$18
Lundbeck LLC
$18
Daiichi Sankyo Inc.
$16
iRhythm Technologies, Inc.
$16
BioMarin Pharmaceutical Inc.
$12
Bardy Diagnostics, Inc.
$12
Top 3 companies account for 91.5% of total payments
Associated products mentioned in payments ›
(CK4) MCOT · (CK7) Extended Holter · AVYCAZ · Arcalyst · BRILINTA · BYSTOLIC · Barostim Neo System · Bidil · BioMonitor · CAMZYOS · CARDIOMEMS · CHANTIX · Carnation Ambulatory Monitor · Corlanor · ELIQUIS · ENTRESTO · EVKEEZA · Edarbi · FABRAZYME · FARXIGA · FLOWTRIEVER CATHETER · FUROSCIX · GORE CARDIOFORM Septal Occluder · HeartMate 3 Left Ventricular Assist Device · Hillrom - Cardiac Ambulatory Monitor · Hillrom - Carnation Ambulatory Monitor · INJECTAFER · INVOKANA · Impella · Inpefa · JARDIANCE · Kerendia · LEQVIO · LINQ II · LUX-DX · LifeVest · Livalo · MULTAQ · Mitra Clip system · NAVITOR · NEXLETOL · NORTHERA · ONPATTRO · OPSUMIT · OPTIMIZER · Ozempic · PRADAXA · PRALUENT · PREVNAR 20 · Ranexa · Repatha · Reveal LINQ · Rybelsus · S · SAMSCA · Saxenda · Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter · TEFLARO · UPTRAVI · VERQUVO · VISICLEAR · VYNDAQEL · Vascepa · Veltassa · Vimizim · WAINUA · WATCHMAN · WATCHMAN FLX · Wegovy · XARELTO · ZEPBOUND · ZIO Patch · remede System
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 (91%) 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 6% for cardiovascular disease in FL.
Equivalent to $1,290 per 100 Medicare services performed
Geographic Context
Cardiologists within 10 mi
152
Per 100K population
15.1
County median income
$68,447
Nearest hospital
BAPTIST MEDICAL CENTER BEACHES
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. Cox is a clinical cardiology specialist, with above-average Medicare volume (top 19% in FL), with speaking/promotional industry engagement in the top 6% of FL peers, with 18 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. Cox experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Cox performed 1,542 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. Cox receive payments from pharmaceutical companies?
Yes. Dr. Cox received a total of $68,774 from 52 companies across 463 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. Cox's costs compare to other cardiologists in Jacksonville Beach?
Dr. Cox's average Medicare payment per service is $62. 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. Cox) 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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