John Karis, MD
Neuroradiology · Phoenix, AZNPI 1609841790
Payments from drug & device makers
What this record shows
The money is spread across several categories — speaking fees (54.9%), consulting fees and food and beverage — rather than concentrated in one kind of arrangement. 7 manufacturers reported payments, led by Philips North America LLC at 55.1% of the total. 2025 is the largest year on record at $5,356, 2.0 times the $2,624 reported in 2019.
Across 17 payments — averaging $548.96 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Philips North America LLC$5K
- Bracco Diagnostics Inc.$4K
- GE HealthCare$376
- Siemens Medical Solutions USA, Inc.$57
- Boston Scientific$30
- Bard Peripheral Vascular, Inc.$28
- plus $15 from 1 others
What the payments were for
- Consulting fees$3,59439%
- Speaking & faculty fees$5,12055%
- Food & beverage$6046%
- Education$150%
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 |
|---|---|---|
| Philips North America LLC | 2 | $5,140 |
| Bracco Diagnostics Inc. | 3 | $3,686 |
| GE HealthCare | 6 | $376 |
| Siemens Medical Solutions USA, Inc. | 2 | $57 |
| Boston Scientific | 2 | $30 |
| Bard Peripheral Vascular, Inc. | 1 | $28 |
| Carl Zeiss Meditec, Inc. | 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.
- (1153) MR Monitoring$5,120
- Contrast Imaging$2,594
- VUEWAY$1,000
How this compares
$9,332 in reported general payments places this provider in the 85th percentile of 22 neuroradiology providers in Arizona.
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 neuroradiology in Phoenix
- Alan PittPhoenix$207K
- Jeffrey MillerPhoenix$10K
- Nicholas MattheesPhoenix$4K
- Todd AbruzzoPhoenix$4K
- Carlos MartinotPhoenix$3K
- Jennifer VaughnPhoenix$2K
- Kristen YeomPhoenix$2K
- Lea AlhilaliPhoenix$1K
- Wende GibbsPhoenix$552
- Kevin KingPhoenix$136
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.