Harishankar Gopakumar, MD
Gastroenterology · Boston, MANPI 1356605703
Payments from drug & device makers
What this record shows
This record is dominated by grants: $35,388 of the $38,504 with a category attached, or 91.9%. Boston Scientific accounts for 92.5% of it on its own, with 13 other manufacturers making up the rest. 2025 is the largest year on record at $36,570, more than ten times the $162 reported in 2019. Among gastroenterology clinicians in MA 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 42 payments — averaging $916.75 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$36K
- Olympus Corporation Of The Americas$1K
- AbbVie$332
- Steris Corporation$243
- Medtronic$201
- Fujifilm Healthcare Americas Corporation$160
- plus $689 from 8 others
What the payments were for
- Grants$35,38892%
- Travel & lodging$1,0533%
- Food & beverage$2,0635%
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 | 3 | $35,634 |
| Olympus Corporation Of The Americas | 14 | $1,245 |
| AbbVie | 10 | $332 |
| Steris Corporation | 2 | $243 |
| Medtronic | 2 | $201 |
| Fujifilm Healthcare Americas Corporation | 2 | $160 |
| Pentax Of America, Inc. | 1 | $144 |
| E.r. Squibb & Sons, L.L.C. | 1 | $123 |
| Abbott | 1 | $123 |
| Sanofi | 1 | $110 |
| Phathom Pharmaceuticals, Inc. | 1 | $90 |
| Johnson & Johnson | 2 | $41 |
| Madrigal Pharmaceuticals | 1 | $36 |
| Mallinckrodt Enterprises LLC | 1 | $22 |
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 - THERAPIES$35,388
- Single Use Electrosurgical Knife KD-655$976
- DISPOSABLE DISTAL ATTACHMENT$976
- PENTAX Medical$288
- TRUFREEZE$243
- EXALT Model D$210
- INSPIRA$144
- C2 CryoBalloon Focal Controller$144
- C2 Cryoballoon$144
- VISIGLIDE$144
- Olympus$144
- Padlock Clip$142
- ZEPOSIA$123
- FreeStyle Libre Pro$123
- GI Genius$113
- DUPIXENT$110
How this compares
$38,504 in reported general payments places this provider in the 90th percentile of 579 gastroenterology providers in Massachusetts.
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 |
|---|---|---|
| Omeprazole | 45 | $458 |
| Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl | 26 | $336 |
| Pantoprazole Sodium | 15 | $172 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in Boston
- Hiroyuki AiharaBoston$728K
- Jessica AllegrettiBoston$696K
- John LeungBoston$682K
- Ramnik XavierBoston$567K
- Adam CheifetzBoston$512K
- Carlo TraversoBoston$447K
- Tyler BerzinBoston$215K
- Marvin RyouBoston$162K
- Nneka UfereBoston$153K
- Christopher ThompsonBoston$127K
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.