Ajay Maker, MD
Surgery · Chicago, ILNPI 1437237740
Payments from drug & device makers
Across 11 payments — averaging $228.21 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Vector Surgical, LLC$800
- Histosonics, Inc.$759
- Dilon Technologies, Inc.$347
- Intera Oncology, Inc$210
- Johnson & Johnson$153
- Boston Scientific$140
- plus $102 from 1 others
What the payments were for
- Consulting fees$80032%
- Travel & lodging$75930%
- Food & beverage$95238%
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 |
|---|---|---|
| Vector Surgical, LLC | 1 | $800 |
| Histosonics, Inc. | 1 | $759 |
| Dilon Technologies, Inc. | 2 | $347 |
| Intera Oncology, Inc | 2 | $210 |
| Johnson & Johnson | 2 | $153 |
| Boston Scientific | 2 | $140 |
| Kerecis Limited | 1 | $102 |
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.
- MarginMarker$800
- HemoBlast Bellows$347
- Echelon Flex$149
- Harmonic$149
- EVARREST$149
- PROLENE$149
- TheraSphere Y90 Glass Microspheres 10 GBq$125
- INTERA$123
- Kerecis Omega3 Wound$102
How this compares
$2,510 in reported general payments places this provider in the 60th percentile of 1,180 surgery providers in Illinois.
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 surgery in Chicago
- Francesco BiancoChicago$1.2M
- Mark KeldahlChicago$765K
- Rami LutfiChicago$411K
- Shabirhusain AbadinChicago$212K
- Jonah StulbergChicago$209K
- Julie DunderdaleChicago$205K
- Pier GiulianottiChicago$135K
- Richard ZhuChicago$128K
- Eric HungnessChicago$126K
- Kyle MuellerChicago$117K
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.