Rui Zhang, MD
Pain Medicine · Sacramento, CANPI 1073869715
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,277 of the $1,844 with a category attached, or 69.3%. 8 manufacturers reported payments, led by Boston Scientific at 29.6% of the total. Reporting peaked in 2024 at $560 and has fallen 61.2% since, to $217 in 2025. That places this record below the midpoint for pain medicine clinicians in CA, where the typical reported total is $1,829.
Across 25 payments — averaging $73.75 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$545
- AbbVie$486
- Foundation Fusion Solutions, LLC$299
- SPR Therapeutics, Inc$233
- Medtronic$142
- Curonix LLC$108
- plus $31 from 2 others
What the payments were for
- Travel & lodging$56731%
- Food & beverage$1,27769%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 | 2 | $545 |
| AbbVie | 11 | $486 |
| Foundation Fusion Solutions, LLC | 1 | $299 |
| SPR Therapeutics, Inc | 4 | $233 |
| Medtronic | 4 | $142 |
| Curonix LLC | 1 | $108 |
| Lilly USA, LLC | 1 | $18 |
| Merck | 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
$1,844 in reported general payments places this provider in the 50th 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Alprazolam | 11 | $14 |
Paid to pharmacies, not to this prescriber.
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.