Ajit Kumar, MD
Interventional Pain Medicine · Oak Lawn, ILNPI 1609818558
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 95.9% of the total across 16 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 7 manufacturers reported payments, led by Merck at 33.6% of the total. Reporting peaked in 2019 at $208 and has fallen 72.1% since, to $58 in 2025. That places this record below the midpoint for interventional pain medicine clinicians in IL, where the typical reported total is $2,254.
Across 16 payments — averaging $30.10 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$162
- Edwards Lifesciences$124
- Pacira Pharmaceuticals Incorporated$91
- BD$43
- Boston Scientific$28
- Pajunk Medical Systems, LP$21
- plus $12 from 1 others
What the payments were for
- Food & beverage$46296%
- Education$204%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Merck | 5 | $162 |
| Edwards Lifesciences | 6 | $124 |
| Pacira Pharmaceuticals Incorporated | 1 | $91 |
| BD | 1 | $43 |
| Boston Scientific | 1 | $28 |
| Pajunk Medical Systems, LP | 1 | $21 |
| Stryker | 1 | $12 |
How this compares
$482 in reported general payments places this provider in the 25th percentile of 93 interventional pain medicine providers in Illinois.
See all interventional pain medicine 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 interventional pain medicine in Oak Lawn
- Rifat KhanOak Lawn$997
- Ahmed ZakiOak Lawn$995
- Alexander FeoktistovNorthfield$922K
- Timothy LubenowChicago$556K
- Sandeep AminChicago$430K
- Matthew JaycoxChicago$123K
- Hong VoChicago$91K
- Asokumar BuvanendranChicago$52K
- Ramsin BenyaminBloomington$32K
- Adam YoungChicago$29K
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.