John Goodwin, MD
Diagnostic Radiology · Knoxville, TNNPI 1346309523
Payments from drug & device makers
What this record shows
15 manufacturers reported payments, led by Penumbra, Inc. at 37.1% of the total. Reporting peaked in 2019 at $3,868 and has fallen 97.8% since, to $85 in 2025. Among diagnostic radiology 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 89 payments — averaging $99.34 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Penumbra, Inc.$3K
- Cook Incorporated$2K
- Medtronic$1K
- Angiodynamics, Inc.$863
- Cook Medical LLC$666
- Stryker$274
- plus $845 from 9 others
What the payments were for
- Travel & lodging$5,01657%
- Food & beverage$3,82543%
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 |
|---|---|---|
| Penumbra, Inc. | 7 | $3,281 |
| Cook Incorporated | 1 | $1,789 |
| Medtronic(2 entities) | 43 | $1,124 |
| Angiodynamics, Inc. | 16 | $863 |
| Cook Medical LLC | 7 | $666 |
| Stryker | 2 | $274 |
| Inari Medical, Inc. | 2 | $184 |
| Boston Scientific | 3 | $176 |
| Guerbet LLC | 1 | $120 |
| Shape Memory Medical Inc. | 2 | $112 |
| EKOS Corporation | 1 | $108 |
| Sirtex Medical Inc | 1 | $74 |
| Valencia Technologies Corporation | 1 | $34 |
| GE HealthCare | 1 | $24 |
| Siemens Medical Solutions USA, 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.
- Indigo$6,139
- Cook Celect$2,140
- IVS - VERTEBRAL AUGMENTATION PRODUCTS$274
- BioFlo$273
- INTELLIS$174
- INTELLIS ADAPTIVESTIM$159
- Microcatheters$120
- FLOWTRIEVER CATHETER, S$119
- CT THROMBECTOMY SYSTEM KIT$119
- ENDURANT IIS$118
- Endurant$111
- EKOSONIC$108
How this compares
$8,841 in reported general payments places this provider in the 95th percentile of 757 diagnostic radiology 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 |
|---|---|---|
| Methylprednisolone | 36 | $208 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 32 | $63 |
| Ibuprofen | 30 | $62 |
| Famotidine | 32 | $40 |
Paid to pharmacies, not to this prescriber.
Other diagnostic radiology in Knoxville
- Gregory MinwellKnoxville$105K
- Daniel HossKnoxville$70K
- Jeffrey MahonyKnoxville$58K
- Robert EberlyKnoxville$42K
- Noel BergquistKnoxville$38K
- Andrew NicholsonKnoxville$35K
- Dana FathyKnoxville$30K
- Amanda SquiresKnoxville$17K
- Donald WalkerKnoxville$7K
- Matthew RamseyKnoxville$7K
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.