John Crocker, MD
Diagnostic Radiology · Jackson, TNNPI 1598732299
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $30,265 of the $45,640 with a category attached, or 66.3%. Penumbra, Inc. accounts for 76.1% of it on its own, with 21 other manufacturers making up the rest. 2025 is the largest year on record at $25,885, more than ten times the $855 reported in 2019. 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 218 payments — averaging $209.36 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Penumbra, Inc.$35K
- Angiodynamics, Inc.$6K
- Relievant Medsystems, Inc.$741
- Inari Medical, Inc.$741
- Medtronic$643
- Stryker$579
- plus $2K from 16 others
What the payments were for
- Speaking & faculty fees$30,26566%
- Travel & lodging$2,9606%
- Food & beverage$6,84815%
- Other$5,56712%
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. | 41 | $34,714 |
| Angiodynamics, Inc. | 12 | $5,965 |
| Relievant Medsystems, Inc. | 11 | $741 |
| Inari Medical, Inc. | 31 | $741 |
| Medtronic(3 entities) | 25 | $643 |
| Stryker | 20 | $579 |
| W. L. Gore & Associates, Inc. | 19 | $416 |
| Silk Road Medical, Inc. | 4 | $410 |
| Boston Scientific | 27 | $368 |
| Shockwave Medical, Inc | 4 | $267 |
| Imperative Care, Inc | 2 | $185 |
| Philips North America LLC | 1 | $148 |
| Bard Peripheral Vascular, Inc. | 6 | $112 |
| Terumo Medical Corporation | 3 | $111 |
| Siemens Medical Solutions USA, Inc. | 3 | $74 |
| Cardiva Medical, Inc. | 2 | $40 |
| Heartflow, Inc. | 1 | $29 |
| Surmodics, Inc. | 2 | $28 |
| Avinger Inc. | 1 | $18 |
| Baxter Healthcare | 1 | $18 |
| Chiesi USA, Inc. | 1 | $16 |
| Bard Access Systems, Inc. | 1 | $16 |
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 System$26,311
- RUBY Coil$7,755
- Auryon Laser System 100-120 Vac$5,668
- Intracept$1,114
- ENROUTE Transcarotid Neuroprotection System$304
- ENROUTE Transcarotid Stent System$304
- ENHANCE Transcarotid Peripheral Access Kit$304
- ENROUTE 0.014 Guidewire$304
- FLOWTRIEVER CATHETER, S$254
- Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter$192
- Smart Coil$182
- ZOOM REPERFUSION CATHETER$156
- ZOOM 88-T LARGE DISTAL PLATFORM$156
- Penumbra System$155
- (4067) Tack Endovascular Systems BTK$148
- IVS - VERTEBROPLASTY PRODUCTS$123
How this compares
$45,640 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.
Other diagnostic radiology in Jackson
- Michael DohertyJackson$600K
- Thomas HodgkissMemphis$170K
- Gregory MinwellKnoxville$105K
- Daniel BrownNashville$81K
- James BuschChattanooga$71K
- Daniel HossKnoxville$70K
- David PeelerMemphis$68K
- Jeffrey MahonyKnoxville$58K
- Robert EberlyKnoxville$42K
- Thomas McLarenNashville$38K
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.