Sigrid Ringenberg, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) · Nashville, TNNPI 1265812614
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (57.3%), education and travel and lodging — rather than concentrated in one kind of arrangement. 13 manufacturers reported payments, led by Johnson & Johnson at 48.3% of the total. 2025 is the largest year on record at $9,731, more than ten times the $17 reported in 2019.
Across 52 payments — averaging $311.27 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Johnson & Johnson$8K
- Intuitive Surgical$5K
- Medical Device Business Services, Inc.$3K
- Paragonix Technologies, Inc.$321
- Davol Inc.$306
- Atricure, Inc.$137
- plus $288 from 7 others
What the payments were for
- Consulting fees$9,28357%
- Travel & lodging$1,95712%
- Food & beverage$1,94612%
- Education$3,00019%
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 |
|---|---|---|
| Johnson & Johnson | 8 | $7,815 |
| Intuitive Surgical | 16 | $4,592 |
| Medical Device Business Services, Inc. | 6 | $2,726 |
| Paragonix Technologies, Inc. | 1 | $321 |
| Davol Inc. | 5 | $306 |
| Atricure, Inc. | 4 | $137 |
| Kls-martin L.p. | 4 | $107 |
| Integra Lifesciences Corporation | 2 | $54 |
| La Jolla Pharmaceutical Company | 2 | $37 |
| Abbott | 1 | $32 |
| Medela LLC | 1 | $23 |
| Medtronic | 1 | $21 |
| Pylant Medical | 1 | $15 |
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.
- ECHELON ENDOPATH$9,283
- Echelon Flex$9,283
- ION$3,000
- Da Vinci Surgical System$1,305
- SherpaPak$321
- LIVERguard$321
- LUNGguard$321
- BaroGuard$321
- PancreasPak$321
- Progel Applicator Spray Tips$135
How this compares
$16,186 in reported general payments places this provider in the 80th percentile of 115 thoracic surgery (cardiothoracic vascular surgery) providers in Tennessee.
See all thoracic surgery (cardiothoracic vascular surgery) providers in Tennessee →
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 |
|---|---|---|
| Oxycodone Hcl | 13 | $61 |
Paid to pharmacies, not to this prescriber.
Other thoracic surgery (cardiothoracic vascular surgery) in Nashville
- Grayson WheatleyNashville$900K
- V ReddyNashville$760K
- Clayton KaiserNashville$124K
- Sreekumar SubramanianNashville$98K
- Erin GillaspieNashville$95K
- Amber EdwardsNashville$83K
- Caitlin DemarestNashville$33K
- Henry ToddNashville$28K
- Swaroop BommareddiNashville$26K
- Ali IrshadNashville$20K
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.