Mark Seifert, MD
Clinical Cardiac Electrophysiology · Phoenix, AZNPI 1942201694
Payments from drug & device makers
Across 460 payments — averaging $113.03 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Abbott$35K
- 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
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 | 183 | $34,524 |
| 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 |
How this compares
$51,993 in reported general payments places this provider in the 55th 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.
Other clinical cardiac electrophysiology in Phoenix
- Vijendra SwarupPhoenix$5.1M
- Akash MakkarPhoenix$3.4M
- Marwan BahuPhoenix$1.7M
- Yoaav KrauthammerPhoenix$385K
- Jonathan WeissPhoenix$299K
- Paul HaasPhoenix$136K
- Michael ZawanehPhoenix$84K
- Praneeth KatrapatiPhoenix$76K
- Komandoor SrivathsanPhoenix$57K
- Divyashree VarmaPhoenix$49K
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.