Chang Hwa Mary Chen, MD
Anesthesiology · Duarte, CANPI 1245287622
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $74,000 of the $94,019 with a category attached, or 78.7%. Delcath Systems accounts for 99.2% of it on its own, with 9 other manufacturers making up the rest. Among anesthesiology clinicians in CA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 79 payments — averaging $1190.11 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Delcath Systems$93K
- Trevena, Inc.$287
- Baxter Healthcare$123
- Amgen$122
- Merck$112
- Abiomed$52
- plus $101 from 4 others
What the payments were for
- Consulting fees$74,00079%
- Travel & lodging$18,41420%
- Food & beverage$1,5802%
- Education$250%
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 |
|---|---|---|
| Delcath Systems | 59 | $93,222 |
| Trevena, Inc. | 5 | $287 |
| Baxter Healthcare | 1 | $123 |
| Amgen | 1 | $122 |
| Merck | 7 | $112 |
| Abiomed | 1 | $52 |
| Pacira Pharmaceuticals Incorporated | 2 | $38 |
| GSK | 1 | $24 |
| Quest Medical Inc. | 1 | $20 |
| Avanos Medical | 1 | $18 |
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.
- Hepzato Kit$92,802
- Olinvyk$239
- PREVELEAK$123
- AIMOVIG$122
How this compares
$94,019 in reported general payments places this provider in the 95th percentile of 5,717 anesthesiology 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 anesthesiology in Duarte
- Michael LewDuarte$151K
- Jack JengSouth San Francisco$1.3M
- Roger PhillipsChico$434K
- David DeyhimyLaguna Hills$344K
- Maxime CannessonLos Angeles$336K
- Alexander RoherSan Diego$282K
- Moody MakarLos Angeles$252K
- Jonathan JahrLos Angeles$223K
- Amir ShbeebLong Beach$216K
- Lawrence ChuStanford$205K
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.