Ajaypal Singh
Gastroenterology · Chicago, ILNPI 1568696409
Payments from drug & device makers
What this record shows
The money is spread across several categories — speaking fees (40.7%), consulting fees and food and beverage — rather than concentrated in one kind of arrangement. 19 manufacturers reported payments, led by Boston Scientific at 47.2% of the total. Among gastroenterology clinicians in IL with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 130 payments — averaging $329.04 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$20K
- Intuitive Surgical$6K
- US Endoscopy$5K
- Ambu Inc.$3K
- Olympus Medical Systems Corporation$2K
- Creo Medical Inc.$2K
- plus $6K from 13 others
Across 3 payments — averaging $6851.67 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Medtronic$21K
What the payments were for
- Consulting fees$9,20022%
- Speaking & faculty fees$17,42541%
- Travel & lodging$5,79414%
- Food & beverage$6,10614%
- Education$4,25010%
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 |
|---|---|---|
| Boston Scientific | 48 | $20,177 |
| Intuitive Surgical | 7 | $5,644 |
| US Endoscopy | 2 | $4,500 |
| Ambu Inc. | 1 | $2,500 |
| Olympus Medical Systems Corporation | 2 | $2,200 |
| Creo Medical Inc. | 9 | $1,993 |
| Olympus Corporation Of The Americas | 10 | $1,350 |
| Steris Corporation | 6 | $1,237 |
| Covidien LP | 13 | $943 |
| Medtronic | 6 | $644 |
| Cook Medical LLC | 11 | $586 |
| Olympus America Inc. | 4 | $406 |
| ERBE USA Inc | 1 | $159 |
| Micro-tech Endoscopy USA, Inc. | 1 | $147 |
| Conmed Corporation | 3 | $145 |
| Endogastric Solutions, Inc | 1 | $54 |
| E.r. Squibb & Sons, L.L.C. | 2 | $43 |
| Pfizer | 2 | $34 |
| Gilead | 1 | $13 |
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.
- GENERAL - BILIARY DEVICES$8,871
- Da Vinci Surgical System$5,444
- HABIB ENDOHPB$4,050
- GENERAL - THERAPIES$2,750
- SPYGLASS$2,403
- Speedboat Ultraslim (SB1L)$1,806
- Olympus EMR & ESD Devices$1,117
- Olympus Hemostasis Devices$1,117
- Olympus EndoTherapy Accessories$1,117
- EXALT Model D$638
- Puritan Bennett$435
- GI Genius$288
- AXIOS$162
- ERBE$159
- RESOLUTION CLIP$155
- ECHOTIP INSIGHT$150
- DAT Closure Device, EndoScreener$147
- ProdiGI$143
- Olympus Biliary Devices$136
- NEXPOWDER$125
How this compares
$42,775 in reported general payments places this provider in the 90th percentile of 787 gastroenterology 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Sod Sulf-Potass Sulf-Mag SulfSodium, Potassium,mag Sulfates | 25 | $1,688 |
| Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl | 51 | $854 |
| Peg-3350 And ElectrolytesPeg3350/Sod Sulf,bicarb,cl/Kcl | 24 | $440 |
| Omeprazole | 11 | $93 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in Chicago
- David RubinChicago$1.5M
- Stephen HanauerChicago$1.4M
- Steven FlammChicago$1.3M
- Darren BrennerChicago$1.1M
- Russell CohenChicago$690K
- Parambir DulaiChicago$668K
- Christopher ChapmanChicago$645K
- Saurabh KapurChicago$532K
- Ikuo HiranoChicago$457K
- Adam SteinChicago$438K
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.