John Klemperer, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Bangor, MENPI 1457337172
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $72,308 of the $103,665 with a category attached, or 69.8%. Atricure, Inc. accounts for 75.5% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2021 at $42,261 and has fallen 74.9% since, to $10,612 in 2025. Among thoracic surgery (cardiothoracic vascular surgery) clinicians in ME with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 175 payments — averaging $592.37 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Atricure, Inc.$78K
- Intuitive Surgical$21K
- Edwards Lifesciences$2K
- AstraZeneca$1K
- Abiomed$489
- Medtronic$142
- plus $210 from 2 others
What the payments were for
- Consulting fees$72,30870%
- Travel & lodging$8,0468%
- Food & beverage$5,8116%
- Education$17,50017%
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 |
|---|---|---|
| Atricure, Inc. | 80 | $78,308 |
| Intuitive Surgical | 56 | $21,358 |
| Edwards Lifesciences | 20 | $1,713 |
| AstraZeneca | 4 | $1,446 |
| Abiomed | 10 | $489 |
| Medtronic | 1 | $142 |
| Bolton Medical Inc | 1 | $110 |
| Livanova USA, Inc. | 3 | $99 |
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.
- EPI-SENSE GUIDED COAGULATION SYSTEM WITH VISITRAX$76,272
- ATRICLIP LAA EXCLUSION SYSTEM$36,603
- Da Vinci Surgical System$10,820
- DAVINCI XI$9,000
- IMFINZI$1,163
- ATRICURE ATRICLIP LAA EXCLUSION$1,014
- EPI-SENSE GUIDED COAGULATION SYS$564
- MITRIS RESILIA Mitral Valve$226
- KONECT RESILIA$215
- ATRICURE CRYOICE CRYOSPHERE CRYOABLATION SYSTEM$168
- Avalus$142
- Impella$111
- THORAFLEX HYBRID$110
- SYNERGY ABLATION SYSTEM$101
How this compares
$103,665 in reported general payments places this provider in the 95th percentile of 22 thoracic surgery (cardiothoracic vascular surgery) providers in Maine.
See all thoracic surgery (cardiothoracic vascular surgery) providers in Maine →
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 thoracic surgery (cardiothoracic vascular surgery) in Bangor
- Darryl HoffmanBangor$9K
- David PantinoBangor$7K
- Robin WillardBangor$2K
- Flavian LupinettiBangor$1K
- Felix HernandezBangor$451
- Ashley SiroisBangor$227
- Kathleen SchaabBangor$96
- Robert CloughBangor$32
- Syed QuadriScarborough$18K
- Carmine FrumientoLewiston$18K
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.