Jeffrey Chen, MD
Nephrology · Monterey, CANPI 1346395704
Payments from drug & device makers
Across 2 payments — averaging $36.23 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Otsuka America Pharmaceutical, Inc.$61
- Amgen$11
What the payments were for
- Food & beverage$1116%
- Education$6184%
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 |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | 1 | $61 |
| Amgen | 1 | $11 |
How this compares
$72 in reported general payments places this provider in the 10th percentile of 1,341 nephrology 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| FarxigaDapagliflozin Propanediol | 35 | $38,043 |
| Sevelamer Carbonate | 161 | $37,525 |
| LokelmaSodium Zirconium Cyclosilicate | 30 | $27,924 |
| VeltassaPatiromer Calcium Sorbitex | 16 | $14,527 |
| JardianceEmpagliflozin | 11 | $12,217 |
| Calcium Acetate | 114 | $9,940 |
| ProcritEpoetin Alfa | 11 | $5,646 |
| Allopurinol | 143 | $4,041 |
| Potassium Citrate ErPotassium Citrate | 28 | $3,249 |
| Losartan Potassium | 314 | $2,904 |
| Chlorthalidone | 93 | $2,369 |
| Doxazosin Mesylate | 95 | $2,227 |
| Carvedilol | 252 | $2,155 |
| Bumetanide | 36 | $1,999 |
| Amlodipine Besylate | 308 | $1,918 |
Paid to pharmacies, not to this prescriber.
Other nephrology in Monterey
- Anjay RastogiLos Angeles$6.3M
- Aamir JamalSan Dimas$5.5M
- Mohamed El-ShahawyLos Angeles$4.4M
- Kalpesh PatelCalabasas$3.6M
- Jehad HaggiagiMission Hills$3.6M
- Malvin YanSouth Gate$3.3M
- Sohan DuaNorthridge$3.2M
- Richard LafayetteStanford$3M
- Anant DesaiGranada Hills$2.9M
- Glenn ChertowStanford$2.2M
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.