Dr. Marcus St John, MD
What this data tells you about Dr. St John
Dr. Marcus St John is an interventional cardiology in Miami, FL, with 20 years in practice. Based on federal Medicare data, Dr. St John performed 1,648 Medicare services across 1,255 unique beneficiaries.
Between the years covered by Open Payments, Dr. St John received a total of $23,098 from 36 pharmaceutical and/or device companies across 161 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in interventional cardiology. 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. St John 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 |
|---|---|---|---|
| EKG interpretation and report | 613 | $7 | $110 |
| Office visit, established patient (30-39 min) | 454 | $97 | $398 |
| Electrocardiogram (EKG), 12-lead | 191 | $11 | $73 |
| Echocardiogram, transthoracic | 62 | $142 | $1,927 |
| New patient office visit (45-59 min) | 56 | $129 | $527 |
| Regadenoson injection (Lexiscan) for heart stress test | 48 | $43 | $237 |
| Blood draw (venipuncture) | 38 | $6 | $6 |
| Technetium tc-99m sestamibi, diagnostic, per study dose | 37 | $89 | $316 |
| Initial hospital admission, moderate complexity | 32 | $114 | $419 |
| Hospital follow-up visit, moderate complexity | 32 | $69 | $252 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician | 21 | $53 | $856 |
| Cardiac catheterization | 19 | $233 | $1,377 |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | 17 | $364 | $1,672 |
| Electrocardiogram (ecg) 2-day continuous | 15 | $13 | $269 |
| Electrocardiogram (ecg) 2-day continuous with review by health care professional | 13 | $14 | $90 |
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 (52%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in interventional cardiology and does not inherently indicate bias, but patients may wish to be aware.
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. St John is a clinical cardiology specialist, with moderate Medicare volume, and speaking/promotional industry engagement, with 20 years of practice experience.
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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