Jason Hamamoto, MD
Pain Medicine · Sacramento, CANPI 1700317260
Payments from drug & device makers
What this record shows
This record is dominated by grants: $10,000 of the $15,615 with a category attached, or 64.0%. Boston Scientific accounts for 79.6% of it on its own, with 11 other manufacturers making up the rest. Reporting peaked in 2024 at $12,819 and has fallen 96.8% since, to $411 in 2025.
Across 63 payments — averaging $247.85 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$12K
- Nevro Corp.$1K
- SPR Therapeutics, Inc$560
- Vertos Medical, Inc.$447
- Medtronic$267
- Abbott$231
- plus $578 from 6 others
What the payments were for
- Grants$10,00064%
- Travel & lodging$1,80912%
- Food & beverage$3,03919%
- Education$7675%
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 | 25 | $12,424 |
| Nevro Corp. | 6 | $1,107 |
| SPR Therapeutics, Inc | 5 | $560 |
| Vertos Medical, Inc. | 5 | $447 |
| Medtronic | 6 | $267 |
| Abbott | 6 | $231 |
| Bioventus LLC | 3 | $186 |
| Saluda Medical Americas, Inc. | 2 | $147 |
| Relievant Medsystems, Inc. | 1 | $141 |
| Stratus Medical, LLC | 1 | $51 |
| Painteq LLC | 2 | $37 |
| Piramal Critical Care | 1 | $17 |
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.
- WaveWriter Alpha Prime 16$10,299
- Omnia$767
- Intracept$564
- SPRINT PNS System$421
- mild Device Kit$248
- Senza$141
- Stimrouter Implantable Kit$139
How this compares
$15,615 in reported general payments places this provider in the 85th percentile of 840 pain medicine providers in California.
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 pain medicine in Sacramento
- Yan ZhouSacramento$64K
- Jason PopeSanta Rosa$2.1M
- Ramana NaiduLarkspur$1.4M
- Foead GeulaStudio City$1.3M
- Krishnan ChakravarthyTemecula$1.3M
- Kasra AmirdelfanWalnut Creek$783K
- Eric GrigsbyNapa$499K
- Jacqueline WeisbeinNapa$494K
- Gerald SacksSanta Monica$389K
- Samir ShethRoseville$356K
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.