Colin Barker, MD
Interventional Cardiology · Nashville, TNNPI 1851551238
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (43.5%), speaking fees and travel and lodging — rather than concentrated in one kind of arrangement. 21 manufacturers reported payments, led by Medtronic at 45.8% of the total. Reporting peaked in 2024 at $67,710 and has fallen 61.8% since, to $25,863 in 2025. Among interventional cardiology clinicians in TN 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 494 payments — averaging $438.91 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$99K
- Boston Scientific$54K
- Heartflow, Inc.$28K
- Abbott$19K
- Siemens Medical Solutions USA, Inc.$6K
- Edwards Lifesciences$5K
- plus $5K from 15 others
Across 188 payments — averaging $10,186 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.
- Edwards Lifesciences$1.6M
- Abbott$96K
- Boston Scientific$94K
- Medtronic$69K
- Chiesi USA, Inc.$34K
- Biotronik Inc.$13K
- plus $12K from 2 others
What the payments were for
- Consulting fees$94,37544%
- Speaking & faculty fees$61,10528%
- Grants$2220%
- Travel & lodging$38,23418%
- Food & beverage$22,88411%
- Education$10%
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 |
|---|---|---|
| Medtronic(2 entities) | 211 | $99,239 |
| Boston Scientific | 70 | $54,111 |
| Heartflow, Inc. | 31 | $27,981 |
| Abbott | 84 | $18,576 |
| Siemens Medical Solutions USA, Inc. | 8 | $5,989 |
| Edwards Lifesciences | 50 | $5,460 |
| Ancora Heart, Inc. | 5 | $1,895 |
| Philips North America LLC | 6 | $1,252 |
| Shockwave Medical, Inc | 7 | $824 |
| Abiomed | 5 | $512 |
| Amgen | 4 | $204 |
| Merit Medical Systems Inc | 1 | $200 |
| Teleflex LLC | 3 | $141 |
| Cardiovascular Systems Inc. | 1 | $139 |
| Cathworks, Inc. | 2 | $138 |
| Biotronik Inc. | 1 | $47 |
| Saranas, Inc. | 1 | $37 |
| ZOLL Circulation Inc | 1 | $28 |
| Sanofi-aventis U.S. LLC | 1 | $18 |
| Johnson & Johnson | 1 | $17 |
| Atricure, Inc. | 1 | $14 |
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.
- CoreValve Evolut$47,816
- FFRct$27,586
- MitraClip$11,588
- GENERAL VASCULAR ACCESS$10,939
- GENERAL - THERAPIES$9,630
- SYMPLICITY G3$8,955
- Resolute$4,183
- COREVALVE EVOLUT R$4,116
- AccuCinch$1,895
- MitraClip System$1,692
- AVVIGO Guidance System$1,640
- IGT Devices Und$958
- Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter$820
- Edwards SAPIEN 3 Transcatheter Heart Valve$528
- Mitra Clip system$461
- Optis Coronary Imaging System$423
- Impella$320
- NAVITOR$297
- SYNERGY$250
- Xience Sierra Coronary Stent System$245
How this compares
$216,820 in reported general payments places this provider in the 95th percentile of 207 interventional cardiology 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 |
|---|---|---|
| EliquisApixaban | 46 | $63,070 |
| Repatha SureclickEvolocumab | 25 | $21,430 |
| Atorvastatin Calcium | 49 | $630 |
| Carvedilol | 33 | $395 |
| Metoprolol Succinate | 23 | $293 |
| ClopidogrelClopidogrel Bisulfate | 18 | $267 |
| Spironolactone | 25 | $222 |
| Amlodipine Besylate | 16 | $163 |
| Lisinopril | 36 | $151 |
| Warfarin Sodium | 12 | $124 |
| Rosuvastatin Calcium | 17 | $99 |
| Nitroglycerin | 11 | $85 |
| Furosemide | 15 | $71 |
| Isosorbide Mononitrate ErIsosorbide Mononitrate | 11 | $58 |
| Losartan Potassium | 12 | $40 |
Paid to pharmacies, not to this prescriber.
Other interventional cardiology in Nashville
- Jimmy KerriganNashville$644K
- Kashish GoelNashville$558K
- Brian JeffersonNashville$547K
- Michael MorseNashville$353K
- Nadia SuttonNashville$344K
- Samuel HorrNashville$246K
- Leah RajNashville$88K
- Andrew GoodmanNashville$57K
- Jay PatelNashville$48K
- John RiddickNashville$47K
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.