Gary Chang
Pain Medicine · Monterey, CANPI 1366411548
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $13,800 of the $18,920 with a category attached, or 72.9%. Boston Scientific accounts for 98.8% of it on its own, with 5 other manufacturers making up the rest. Reporting peaked in 2019 at $11,572 and has fallen 97.5% since, to $289 in 2025. Among pain medicine clinicians in CA with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 301 payments — averaging $62.86 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$19K
- Otsuka America Pharmaceutical, Inc.$146
- Nevro Corp.$34
- ITI, Inc. (d/b/a Intra-cellular Therapies, Inc.)$26
- AbbVie$15
- Abbott$13
What the payments were for
- Speaking & faculty fees$13,80073%
- Travel & lodging$7834%
- Food & beverage$4,33723%
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 | 291 | $18,686 |
| Otsuka America Pharmaceutical, Inc. | 6 | $146 |
| Nevro Corp. | 1 | $34 |
| ITI, Inc. (d/b/a Intra-cellular Therapies, Inc.) | 1 | $26 |
| AbbVie | 1 | $15 |
| Abbott | 1 | $13 |
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
$18,920 in reported general payments places this provider in the 90th percentile of 840 pain medicine providers in California.
Other pain medicine in Monterey
- Lisa KroopfMonterey$91K
- 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).
- Identity: NPPES NPI Registry, July 2026.