Medicare Enrolled
Dr. Marshall Marcus, M.D.
Internal Medicine · St Petersburg, FL
Practice pattern: Electrophysiology & Remote
— Practice combining electrophysiology and remote services
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. Marcus 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 →
Are you Dr. Marcus?
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What this data tells you about Dr. Marcus
Dr. Marshall Marcus is an internal medicine specialist in St Petersburg, FL, with 14 years of NPI registration. Based on federal Medicare data, Dr. Marcus performed 2,072 Medicare services across 1,520 unique beneficiaries.
Between the years covered by Open Payments, Dr. Marcus received a total of $84,641 from 50 pharmaceutical and/or device companies across 865 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in internal medicine. 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. Marcus 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.
✓ 14 years in practice
▲ Top 20% volume in FL
$84,641 industry payments
Medicare Practice Summary
Medicare Utilization ↗2,072
Medicare services
Top 20% in FL for internal medicine
1,520
Unique beneficiaries
$58
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~148 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 |
|---|---|---|---|
| Remote pacemaker/defibrillator monitoring, 90 days | 380 | $15 | $107 |
| Remote pacemaker monitoring, 90 days | 286 | $21 | $115 |
| Electrocardiogram (EKG), 12-lead | 183 | $11 | $67 |
| Office visit, established patient (30-39 min) | 156 | $95 | $225 |
| Programming of dual lead pacemaker system | 108 | $59 | $203 |
| Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days | 103 | $25 | $226 |
| Hospital follow-up visit, high complexity | 99 | $96 | $220 |
| Evaluation of implantable heart and blood vessel monitoring system, remote up to 30 days | 98 | $18 | $86 |
| Evaluation of cardiac rhythm monitor system, remote up to 30 days | 88 | $19 | $92 |
| Interrogation device evaluation(s), (remote) up to 30 days; implantable cardiovascular physiologic monitor system, implantable loop recorder system, or subcutaneous cardiac rhythm monitor system, remote data acquisition(s), receipt of transmissions and tec | 86 | $26 | $169 |
| Initial hospital admission, high complexity | 63 | $126 | $435 |
| Hospital follow-up visit, moderate complexity | 55 | $62 | $153 |
| Initial hospital admission, moderate complexity | 48 | $93 | $300 |
| Office visit, established patient (20-29 min) | 47 | $70 | $153 |
| Evaluation of implantable heart and blood vessel monitoring system | 29 | $35 | $100 |
| Office visit, established patient, complex (40-54 min) | 28 | $138 | $303 |
| Comprehensive electrophysiologic evaluation with catheter destruction of abnormality causing atrial fibrillation (uncoordinated contraction of upper chambers of heart) by pulmonary vein isolation | 26 | $796 | $4,135 |
| Programming of single lead pacemaker system | 25 | $51 | $173 |
| Programming of dual lead implantable defibrillator system | 24 | $70 | $276 |
| External shock to heart to regulate heart beat | 23 | $87 | $425 |
| New patient office visit (45-59 min) | 19 | $116 | $358 |
| Insertion of catheters for recording and pacing of left lower heart chamber rhythm and induction of abnormal rhythm | 18 | $140 | $660 |
| Insertion of catheters and destruction of tissue to treat abnormal heart rhythm | 15 | $257 | $1,549 |
| Hospital discharge day management, 30 minutes or less | 14 | $63 | $151 |
| Insertion of pacemaker and upper and lower heart chamber electrode | 13 | $374 | $2,097 |
| Programming of multiple lead implantable defibrillator system | 13 | $72 | $306 |
| Programming of heart rhythm stimulation after drug infusion | 13 | $67 | $666 |
| Ultrasound evaluation of heart blood vessel with review by radiologist | 12 | $58 | $960 |
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.
49.4% high complexity
0.6% medium
50.0% routine
Industry Payment Transparency
Open Payments through 2024 ↗$84,641
Total received (2018-2024)
Avg $12,092/year across 7 years
Top 1% in FL for internal medicine
50
Companies
865
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
$64,576 (76.3%)
Scientific / Research
Research funding and grants
$15,171 (17.9%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$4,894 (5.8%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$3,633
2023
$10,360
2022
$14,640
2021
$4,516
2020
$4,709
2019
$16,953
2018
$29,829
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
BIOTRONIK INC.
$42,311
Medtronic Vascular, Inc.
$17,857
Boston Scientific Corporation
$6,591
Abbott Laboratories
$4,912
Medtronic, Inc.
$2,409
Medical Device Business Services, Inc.
$1,859
Biosense Webster, Inc.
$1,442
Acutus Medical, Inc.
$995
ATRICURE, INC.
$992
E.R. Squibb & Sons, L.L.C.
$944
Boehringer Ingelheim Pharmaceuticals, Inc.
$589
PFIZER INC.
$478
Amgen Inc.
$348
Impulse Dynamics (USA) Inc.
$286
Novartis Pharmaceuticals Corporation
$243
Janssen Pharmaceuticals, Inc
$242
Philips Electronics North America Corporation
$241
SANOFI-AVENTIS U.S. LLC
$213
ShockWave Medical, Inc
$168
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$165
Itamar Medical Inc
$154
Reflow Medical Inc
$136
CARDIVA MEDICAL, INC.
$118
AstraZeneca Pharmaceuticals LP
$104
Merck Sharp & Dohme LLC
$92
Esperion Therapeutics, Inc.
$87
Kestra Medical Technology Services, Inc.
$71
Merck Sharp & Dohme Corporation
$53
GENZYME CORPORATION
$47
BOSTON SCIENTIFIC CORPORATION
$45
Lexicon Pharmaceuticals, Inc.
$44
Novo Nordisk Inc
$40
Amarin Pharma Inc.
$38
CardioFocus, Inc.
$31
Alnylam Pharmaceuticals Inc.
$28
SCPHARMACEUTICALS INC.
$25
Philips North America LLC
$24
iRhythm Technologies, Inc.
$23
Daiichi Sankyo Inc.
$21
Chiesi USA, Inc.
$20
Endologix LLC
$18
Regeneron Healthcare Solutions, Inc.
$18
Inogen, Inc.
$18
Kiniksa Pharmaceuticals International, plc
$17
Braemar Manufacturing, LLC
$16
Bayer Healthcare Pharmaceuticals Inc.
$15
ARBOR PHARMACEUTICALS, INC.
$14
Kerecis Limited
$14
Kiniksa Pharmaceuticals, Ltd.
$13
Kowa Pharmaceuticals America, Inc.
$12
Top 3 companies account for 78.9% of total payments
Associated products mentioned in payments ›
(5044) MCOT · (5050) Ext Holter · (7999) SRC Undivided · (9124) LM Undivided · (9278) Bridge · (9556) IVC Filter Removal · (AM5) Lead management · AMPLATZER · AMPLATZER AMULET · ASSURITY · AVEIR · AZURE XT DR MRI SURESCAN · Acticor · Acticor 7 VR-T DX · Advisa · Advisor Catheter · Agilis NxT EP Introducer · Allure CRT Pacemaker · Allure Quadra RF CRT Pacemaker · Alto Abdominal Stent Graft System · Ampere RF Ablation Generator · Amplia MRI · Arcalyst · Arctic Front · Assure WCD · Assurity Pacemaker · Attain · Azure · BIOMONITOR · BRILINTA · BRK EP Transseptal Access · CAMZYOS · CARDIOBLATE CRYOFLEX · CARTO 3 · COBALT DR MRI SURESCAN · Cardiac Monitoring Suite · Cardiva VASCADE MVP VVCS 6-12F · CareLink · Carto 3 · Carto 3 System · CartoSound · Claria MRI · Cobalt · Confidense · Confirm Rx · Cool Point Irrigation Pump · Corlanor · ELIQUIS · ENSITE · ENSITE PRECISION · ENTRESTO · EPI-SENSE GUIDED COAGULATION SYS · EPI-SENSE GUIDED COAGULATION SYSTEM WITH VISITRAX · EVKEEZA · Edarbyclor · Edora · Edora 8 DR-T · Ellipse ICD · EnSite Precision Cardiac Mapping System · Ensite Cardiac Mapping System · FABRAZYME · FARXIGA · FUROSCIX · Fast-Cath EP Introducer · Fortify Assura · GENERAL BRADY · GENERAL TACHY · GENERAL THERAPIES · GENERAL EP · GENERAL THERAPIES · General - Structural Heart · HeartLight System · HeartMate 3 Left Ventricular Assist Device · INJECTAFER · InogenOne · Inpefa · JARDIANCE · KENGREAL · Kerecis Omega3 SurgiClose · Kerendia · LEQVIO · LINQ II · LUX-Dx Insertable Cardiac Monitor · LifeVest · Livalo · MERLIN@HOME · MICRA · MITRACLIP · MULTAQ · MYCARELINK · MYLUX · Merlin Connectivity and Remote · Micra · Mitra Clip system · MitraClip System · NA · NEXLETOL · OCTARAY MAPPING CATHETER · ONPATTRO · OPTIMIZER · Optimizer · Optimizer Smart System · Optisure Defibrillation ICD Lead · PRADAXA · PULSESELECT · PatientCare Link · QDOT MICRO Catheter · QUADRA ASSURA · Quadra Allure MP RF CRT Pacemkr · Quadra Assura CRT Defibrillator · Quartet CRT Lead · RESONATE · RESONATE EL ICD VR · RHYTHMIA · Repatha · Reveal LINQ · Rivacor · Rivacor 7 DR-T · Rybelsus · SELECTSECURE · SHOCKWAVE IVL SYSTEM WITH THE SHOCKWAVE C2 CORONARY IVL CATHETER · SelectSecure · Solia · Soundstar · TENDRIL · THORATEC HEARTMATE 3 LVAS IMPLANT KIT · TYRX · TactiCath Quartz CFA Catheter · VERQUVO · VYNDAMAX · VYNDAQEL · Vascepa · Visia AF · WATCHMAN · WATCHMAN Access System · WATCHMAN FLX · WatchPAT · XARELTO · ZIO XT Patch · ZOOM
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 (76%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 1% for internal medicine in FL.
Equivalent to $4,085 per 100 Medicare services performed
Geographic Context
Internal medicine physicians within 10 mi
1,361
Per 100K population
141.7
County median income
$70,293
Nearest hospital
HCA FLORIDA NORTHSIDE 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. Marcus is an electrophysiology & remote specialist, with above-average Medicare volume (top 20% in FL), with low-engagement industry engagement in the top 1% of FL peers.
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. Marcus experienced with remote pacemaker/defibrillator monitoring, 90 days?
Based on Medicare claims data, Dr. Marcus performed 380 remote pacemaker/defibrillator monitoring, 90 days 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. Marcus receive payments from pharmaceutical companies?
Yes. Dr. Marcus received a total of $84,641 from 50 companies across 865 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. Marcus's costs compare to other internal medicine physicians in St Petersburg?
Dr. Marcus's average Medicare payment per service is $58. 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. Marcus) 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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