Osamu Sakai, MD
Neuroradiology · Boston, MANPI 1770550956
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $84,410 of the $84,410 with a category attached, or 100.0%. Merck accounts for 60.7% of it on its own, with 2 other manufacturers making up the rest. Reporting peaked in 2019 at $39,240 and has fallen 97.5% since, to $1,000 in 2025.
Across 90 payments — averaging $937.89 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$51K
- Pfizer$30K
- Eli Lilly$4K
Across 67 payments — averaging $3498.93 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.
- GSK$141K
- Beigene (suzhou) Co., Ltd.$42K
- Beigene USA, Inc.$19K
- Beigene, Ltd.$17K
- Philips North America LLC$8K
- E.r. Squibb & Sons, L.L.C.$7K
- plus $707 from 1 others
What the payments were for
- Consulting fees$84,410100%
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.
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
$84,410 in reported general payments places this provider in the 85th percentile of 35 neuroradiology 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.
Other neuroradiology in Boston
- Alma SorensenBoston$974K
- Joshua HirschBoston$651K
- Jonathan KleefieldBoston$213K
- Alexander NorbashBoston$77K
- Michael LevBoston$17K
- Sandra RinconBoston$12K
- Javier RomeroBoston$8K
- Geoffrey YoungBoston$3K
- Roman KlufasBoston$3K
- Francesco MassariBoston$2K
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.