Mark Seifert, MD
Clinical Cardiac Electrophysiology · Phoenix, AZNPI 1942201694
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (56.2%), consulting fees and travel and lodging — rather than concentrated in one kind of arrangement. 31 manufacturers reported payments, led by Abbott at 49.4% of the total. Reporting peaked in 2019 at $10,756 and has fallen 64.6% since, to $3,808 in 2025. That places this record below the midpoint for clinical cardiac electrophysiology clinicians in AZ, where the typical reported total is $29,180.
Across 449 payments — averaging $76.87 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Abbott$17K
- Boston Scientific$3K
- Impulse Dynamics (USA) Inc.$2K
- Medtronic$2K
- Cardiofocus, Inc.$1K
- ZOLL Services LLC (a/k/a ZOLL Lifecor Corp)$1K
- plus $7K from 25 others
Across 11 payments — averaging $1588.80 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Abbott$17K
What the payments were for
- Consulting fees$8,89626%
- Speaking & faculty fees$9883%
- Travel & lodging$5,22515%
- Food & beverage$19,39556%
- Education$120%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Abbott | 172 | $17,047 |
| Boston Scientific | 42 | $3,073 |
| Impulse Dynamics (USA) Inc. | 14 | $2,236 |
| Medtronic(2 entities) | 23 | $1,936 |
| Cardiofocus, Inc. | 16 | $1,442 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 25 | $1,397 |
| Cardiva Medical, Inc. | 71 | $1,308 |
| Medical Device Business Services, Inc. | 7 | $1,263 |
| W. L. Gore & Associates, Inc. | 2 | $1,148 |
| Biosense Webster, Inc. | 13 | $753 |
| Sanofi-aventis U.S. LLC | 5 | $733 |
| Melinta Therapeutics, LLC | 1 | $309 |
| Angiodynamics, Inc. | 1 | $228 |
| Atricure, Inc. | 2 | $220 |
| Cvrx, Inc. | 2 | $175 |
| Chiesi USA, Inc. | 9 | $166 |
| AstraZeneca | 8 | $132 |
| Cook Medical LLC | 1 | $121 |
| Altathera Pharmaceuticals LLC | 1 | $117 |
| Philips North America LLC | 3 | $113 |
| Abiomed | 4 | $108 |
| Novartis | 4 | $101 |
| Johnson & Johnson | 6 | $86 |
| Bardy Diagnostics, Inc. | 5 | $85 |
| Kestra Medical Technology Services, Inc. | 3 | $65 |
| Akcea Therapeutics, Inc. | 2 | $51 |
| Amgen | 2 | $34 |
| E.r. Squibb & Sons, L.L.C. | 2 | $26 |
| Boehringer Ingelheim | 1 | $19 |
| Cardinal Health 200 LLC | 1 | $13 |
| Amarin Pharma, Inc. | 1 | $12 |
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.
- AVEIR$2,939
- Quadra Assura CRT Defibrillator$2,225
- OPTIMIZER$2,028
- MediGuide Technology$1,691
- Carto 3 System$1,272
- Ensite Cardiac Mapping System$1,228
- Quadra Allure MP RF CRT Pacemkr$1,183
- Product in Development$1,148
- Watchman$1,038
- OPTIMIZER SMART SYSTEM$900
- HeartLight System$857
- MULTAQ$650
- GENERAL - THERAPIES$625
- GALLANT$561
- LifeVest$533
- Allure CRT Pacemaker$500
- Nanostim Leadleas Pacemaker$485
- ASSURITY$433
- WATCHMAN FLX$301
- Assurity Pacemaker$274
How this compares
$34,516 in reported general payments places this provider in the 50th percentile of 80 clinical cardiac electrophysiology providers in Arizona.
See all clinical cardiac electrophysiology providers in Arizona →
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 | 150 | $174,631 |
| MultaqDronedarone Hcl | 51 | $81,417 |
| XareltoRivaroxaban | 18 | $23,739 |
| Flecainide Acetate | 87 | $7,401 |
| Propafenone Hcl ErPropafenone Hcl | 38 | $7,148 |
| Dofetilide | 22 | $1,698 |
| Amiodarone Hcl | 119 | $1,573 |
| ClopidogrelClopidogrel Bisulfate | 110 | $1,098 |
| Digoxin | 40 | $513 |
| Warfarin Sodium | 22 | $321 |
| Metoprolol Succinate | 17 | $219 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| Sanofi-aventis U.S. LLCMultaq | $733 | $81,41751 claims |
| Johnson & JohnsonXarelto | $86 | $23,73918 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 50th percentile of 80 clinical cardiac electrophysiology providers in Arizona.
Other clinical cardiac electrophysiology in Phoenix
- Akash MakkarPhoenix$318K
- Jonathan WeissPhoenix$290K
- Yoaav KrauthammerPhoenix$238K
- Vijendra SwarupPhoenix$187K
- Paul HaasPhoenix$136K
- Praneeth KatrapatiPhoenix$76K
- Komandoor SrivathsanPhoenix$57K
- Divyashree VarmaPhoenix$49K
- Sushmitha PatibandlaPhoenix$47K
- Mohamed AbdelrahmanPhoenix$45K
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.