Marshal Fox, MD
Clinical Cardiac Electrophysiology · Springfield, MANPI 1093962334
Payments from drug & device makers
Across 30 payments — averaging $155.67 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Tri-anim Health Services, Inc.$2K
- Abbott$1K
- Boston Scientific$566
- Biosense Webster, Inc.$327
- Medtronic$251
- Impulse Dynamics (USA) Inc.$139
- plus $198 from 3 others
What the payments were for
- Consulting fees$2,00043%
- Travel & lodging$75916%
- Food & beverage$1,91141%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Tri-anim Health Services, Inc. | 2 | $2,000 |
| Abbott | 6 | $1,189 |
| Boston Scientific | 7 | $566 |
| Biosense Webster, Inc. | 3 | $327 |
| Medtronic(2 entities) | 8 | $251 |
| Impulse Dynamics (USA) Inc. | 1 | $139 |
| Daiichi Sankyo Inc. | 1 | $109 |
| ZOLL Respicardia, Inc. | 1 | $68 |
| Stryker | 1 | $21 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$4,670 in reported general payments places this provider in the 20th percentile of 106 clinical cardiac electrophysiology providers in Massachusetts.
See all clinical cardiac electrophysiology providers in Massachusetts →
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| EliquisApixaban | 368 | $394,054 |
| XareltoRivaroxaban | 67 | $54,784 |
| Flecainide Acetate | 197 | $9,263 |
| Dabigatran EtexilateDabigatran Etexilate Mesylate | 23 | $5,490 |
| Metoprolol Succinate | 276 | $5,005 |
| Amiodarone Hcl | 103 | $1,957 |
| Nebivolol Hcl | 27 | $1,242 |
| Diltiazem 24hr Er (Cd)Diltiazem Hcl | 32 | $887 |
| Atorvastatin Calcium | 56 | $817 |
| Mexiletine Hcl | 13 | $643 |
| SotalolSotalol Hcl | 38 | $553 |
| Diltiazem 24hr ErDiltiazem Hcl | 15 | $520 |
| Fludrocortisone Acetate | 13 | $506 |
| Metoprolol Tartrate | 55 | $497 |
| ClopidogrelClopidogrel Bisulfate | 54 | $496 |
Paid to pharmacies, not to this prescriber.
Other clinical cardiac electrophysiology in Springfield
- Nadavaluru ReddySpringfield$69K
- Paul MadajSpringfield$61K
- Fadi ChalhoubSpringfield$29K
- John MarencoSpringfield$27K
- Abhishek BhagatSpringfield$15K
- Elad AnterBoston$4.5M
- Moussa MansourBoston$3.8M
- Alexei ShvilkinSouth Weymouth$3.4M
- David McManusWorcester$1.5M
- Vassilios BezzeridesBoston$1.3M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.