Oscar Serrano, MD
Transplant Surgery · Hartford, CTNPI 1003960626
Payments from drug & device makers
What this record shows
This record is dominated by education: $4,136 of the $6,048 with a category attached, or 68.4%. Intuitive Surgical accounts for 90.2% of it on its own, with 8 other manufacturers making up the rest. Reporting peaked in 2022 at $4,290 and has fallen 68.5% since, to $1,353 in 2025.
Across 28 payments — averaging $216.01 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$5K
- Inari Medical, Inc.$149
- Stryker$141
- Sanofi-aventis U.S. LLC$124
- Veloxis Pharmaceuticals, Inc.$99
- Johnson & Johnson$25
- plus $57 from 3 others
What the payments were for
- Travel & lodging$1,02217%
- Food & beverage$89015%
- Education$4,13668%
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 |
|---|---|---|
| Intuitive Surgical | 15 | $5,453 |
| Inari Medical, Inc. | 1 | $149 |
| Stryker | 1 | $141 |
| Sanofi-aventis U.S. LLC | 2 | $124 |
| Veloxis Pharmaceuticals, Inc. | 5 | $99 |
| Johnson & Johnson | 1 | $25 |
| E.r. Squibb & Sons, L.L.C. | 1 | $24 |
| Eisai Inc. | 1 | $18 |
| Sanofi | 1 | $14 |
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.
How this compares
Too few transplant surgery providers in Connecticutto place this figure against a meaningful peer group, so we don't.
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 transplant surgery in Hartford
- Wasim DarHartford$6K
- Anne LallyHartford$4K
- Glyn MorganHartford$1K
- Patricia SheinerHartford$1K
- Sanjay KulkarniNew Haven$2K
- Gregory AziaNew London$387
- Joohyun KimNew Haven$227
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.