Kenneth Chang, MD
Gastroenterology · Newport Beach, CANPI 1518047604
Payments from drug & device makers
Across 481 payments — averaging $2743.67 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Wilson Cook Medical Incorporated$585K
- Endogastric Solutions, Inc$424K
- Merit Medical Systems Inc$70K
- Olympus Corporation Of The Americas$66K
- Olympus America Inc.$39K
- Medtronic$29K
- plus $108K from 17 others
Across 4 payments — averaging $1159.38 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Cook Research Incorporated$5K
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 |
|---|---|---|
| Wilson Cook Medical Incorporated | 80 | $584,849 |
| Endogastric Solutions, Inc | 116 | $423,544 |
| Merit Medical Systems Inc | 19 | $69,773 |
| Olympus Corporation Of The Americas | 62 | $66,109 |
| Olympus America Inc. | 50 | $39,058 |
| Medtronic | 22 | $28,534 |
| Erbe Elektromedizin GmbH | 2 | $21,227 |
| Fujifilm Healthcare Americas Corporation | 15 | $16,454 |
| Cook Incorporated | 7 | $14,547 |
| Johnson & Johnson | 2 | $12,000 |
| Pentax Of America, Inc. | 6 | $10,272 |
| Olympus Corporation | 7 | $9,225 |
| Creo Medical Inc. | 5 | $9,001 |
| ERBE USA Inc | 15 | $6,921 |
| Cook Medical LLC | 39 | $2,865 |
| Boston Scientific | 15 | $2,166 |
| Spiration, Inc. | 2 | $1,230 |
| Olympus Medical Systems Corporation | 2 | $769 |
| Covidien LP | 5 | $435 |
| Apollo Endosurgery US Inc | 4 | $282 |
| Conmed Corporation | 4 | $280 |
| Lucid Diagnostics Inc. | 1 | $128 |
| Novo Nordisk | 1 | $39 |
How this compares
$1,319,706 in reported general payments places this provider in the 95th percentile of 1,885 gastroenterology 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 gastroenterology in Newport Beach
- Peter WinkleCypress$116.7M
- Manuchehr DaraniSanta Ana$17.7M
- Jatinder PruthiLancaster$4.4M
- Long DangWestminster$4.3M
- Muhammad SheikhFresno$4.3M
- Gregory WienerChula Vista$3.5M
- Gil MelmedLos Angeles$3M
- Christopher BowlusSacramento$3M
- Bennett RothLos Angeles$2.8M
- Brigid BolandSan Diego$2.4M
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.