Jeffrey Ishizuka, MD
Medical Oncology · New Haven, CTNPI 1134552185
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $883 of the $1,016 with a category attached, or 86.8%. Every reported general payment came from a single manufacturer, E.r. Squibb & Sons, L.L.C.. That places this record below the midpoint for medical oncology clinicians in CT, where the typical reported total is $3,212.
Across 6 payments — averaging $169.40 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- E.r. Squibb & Sons, L.L.C.$1K
Across 50 payments — averaging $11,749 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.
- AstraZeneca$439K
- Regeneron$135K
- Merck$13K
What the payments were for
- Travel & lodging$88387%
- Food & beverage$13413%
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 |
|---|---|---|
| E.r. Squibb & Sons, L.L.C. | 6 | $1,016 |
How this compares
$1,016 in reported general payments places this provider in the 45th percentile of 79 medical oncology providers in Connecticut.
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 |
|---|---|---|
| Levothyroxine Sodium | 12 | $42 |
Paid to pharmacies, not to this prescriber.
Other medical oncology in New Haven
- Peter MarksNew Haven$578K
- Daniel PetrylakNew Haven$446K
- Mandar MuzumdarNew Haven$371K
- Barbara BurtnessNew Haven$297K
- Ian KropNew Haven$219K
- Francine FossNew Haven$193K
- Anne ChiangNew Haven$158K
- Mario SznolNew Haven$157K
- Lajos PusztaiNew Haven$152K
- Howard HochsterNew Haven$133K
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.