Si Zhang, DO
Pain Medicine · Stamford, CTNPI 1306282652
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,020 of the $1,239 with a category attached, or 82.4%. It is spread thinly across 11 manufacturers, the largest accounting for just 17.0% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2019 at $454 and has fallen 92.5% since, to $34 in 2025. That places this record below the midpoint for pain medicine clinicians in CT, where the typical reported total is $2,061.
Across 17 payments — averaging $72.87 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$211
- Abbott$166
- Inari Medical, Inc.$155
- Saluda Medical Americas, Inc.$151
- Flowonix Medical Incorporated$110
- Bioness Inc$110
- plus $336 from 5 others
What the payments were for
- Speaking & faculty fees$1099%
- Food & beverage$1,02082%
- Entertainment$1109%
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 | 4 | $211 |
| Abbott | 2 | $166 |
| Inari Medical, Inc. | 1 | $155 |
| Saluda Medical Americas, Inc. | 1 | $151 |
| Flowonix Medical Incorporated | 1 | $110 |
| Bioness Inc | 1 | $110 |
| BD | 3 | $109 |
| AbbVie | 1 | $100 |
| Relievant Medsystems, Inc. | 1 | $61 |
| Nevro Corp. | 1 | $59 |
| SPR Therapeutics, Inc | 1 | $7 |
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
$1,239 in reported general payments places this provider in the 40th percentile of 69 pain medicine 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 |
|---|---|---|
| BelbucaBuprenorphine Hcl | 55 | $44,346 |
| Buprenorphine-NaloxoneBuprenorphine Hcl/Naloxone Hcl | 92 | $13,817 |
| LyricaPregabalin | 15 | $13,680 |
| OxycontinOxycodone Hcl | 13 | $9,736 |
| ZtlidoLidocaine | 16 | $9,654 |
| Pregabalin | 262 | $8,128 |
| Buprenorphine | 34 | $5,770 |
| Gabapentin | 361 | $5,219 |
| MovantikNaloxegol Oxalate | 13 | $5,186 |
| Lidocaine | 42 | $4,987 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 186 | $3,909 |
| Oxycodone Hcl | 214 | $3,768 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 111 | $2,519 |
| Duloxetine Hcl | 160 | $2,198 |
| Tramadol Hcl | 126 | $1,898 |
Paid to pharmacies, not to this prescriber.
Other pain medicine in Stamford
- Ofer WellischStamford$18K
- Yuting XiongStamford$6K
- Andrew IlligStamford$2K
- Joseph HungStamford$141
- Sandeep JoharWaterbury$329K
- David GutierrezNew Haven$151K
- Brian GrosbergWest Hartford$99K
- Yili HuangNew Haven$18K
- Jared RosenbergGreenwich$12K
- Sandhya MehlaWest Hartford$12K
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.