Jennifer Chen, MD
Gastroenterology · San Francisco, CANPI 1376771758
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $2,000 of the $2,025 with a category attached, or 98.8%. Merck accounts for 98.8% of it on its own, with 1 other manufacturer making up the rest. That places this record below the midpoint for gastroenterology clinicians in CA, where the typical reported total is $1,790.
Across 2 payments — averaging $1012.45 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$2K
- Abbott$25
Across 2 payments — averaging $70,657 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.
- Merck$141K
What the payments were for
- Consulting fees$2,00099%
- Food & beverage$251%
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.
How this compares
$2,025 in reported general payments places this provider in the 50th 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 San Francisco
- Kenneth BinmoellerSan Francisco$507K
- Uma MahadevanSan Francisco$325K
- Francis YaoSan Francisco$159K
- Bennett RothLos Angeles$2.8M
- Douglas NguyenMission Viejo$2M
- Sammy SaabLos Angeles$1.9M
- Kenneth ChangNewport Beach$1.3M
- Joo HwangStanford$1M
- Drew SchembreWalnut Creek$659K
- Quan Nhula Jolla$641K
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.