Dr. Marcus Cox, MD
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.
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 (30-39 min) | 1,542 | $91 | $320 |
| Hospital follow-up visit, high complexity | 356 | $91 | $260 |
| Echocardiogram, transthoracic | 297 | $59 | $377 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician | 258 | $16 | $55 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician | 258 | $11 | $37 |
| Anticoagulant management of patient taking warfarin | 239 | $8 | $29 |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | 215 | $58 | $195 |
| Electrocardiogram (EKG), 12-lead | 214 | $10 | $69 |
| EKG interpretation and report | 200 | $6 | $26 |
| Ultrasound of heart with color-depicted blood flow, rate and valve function | 179 | $2 | $8 |
| Prothrombin time test (blood clotting) | 140 | $4 | $11 |
| Initial hospital admission, moderate complexity | 133 | $100 | $343 |
| Ultrasound of heart, follow-up | 132 | $19 | $63 |
| New patient office visit (45-59 min) | 130 | $113 | $423 |
| Ultrasound of heart with probe in esophagus, with report | 128 | $81 | $272 |
| Ultrasound of heart blood flow, valves and chambers | 124 | $14 | $45 |
| Ultrasound of both sides of head and neck blood flow | 115 | $166 | $441 |
| Initial hospital admission, high complexity | 108 | $133 | $503 |
| Ultrasound of leg arteries or artery grafts | 106 | $221 | $517 |
| Hospital follow-up visit, moderate complexity | 74 | $60 | $184 |
| Ultrasound of heart blood flow, valves and chambers, follow-up | 54 | $6 | $19 |
| External shock to heart to regulate heart beat | 49 | $82 | $391 |
| Electrocardiogram (ecg) up to 30 days continuous with review and report by health care professional | 49 | $20 | $66 |
| Electrocardiogram (ecg) 2-day continuous with review by health care professional | 47 | $12 | $47 |
| Ultrasound of heart during rest, exercise and/or drug-induced stress with report | 26 | $50 | $175 |
| Ultrasound study of one arm or leg veins with compression and maneuvers | 23 | $16 | $56 |
| Ultrasound study of arm or leg veins with compression and maneuvers | 22 | $25 | $88 |
| Complete ultrasound of abdomen and pelvis artery and vein blood flow | 20 | $44 | $143 |
| Ultrasound of leg arteries at rest and after exercise | 19 | $18 | $65 |
| Heart muscle strain imaging | 18 | $8 | $94 |
| Office visit, established patient, complex (40-54 min) | 17 | $132 | $454 |
| Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days | 14 | $14 | $62 |
| 3d radiographic procedure | 13 | $7 | $814 |
| Ultrasound scan of abdominal aorta | 11 | $24 | $68 |
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 ›
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.
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. 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
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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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