Sijie Zheng, MD
Nephrology · Oakland, CANPI 1407061823
Payments from drug & device makers
Across 44 payments — averaging $316.43 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Otsuka Pharmaceutical Development & Commercialization, Inc.$9K
- Calliditas Therapeutics US Inc.$3K
- Nxstage Medical, Inc.$268
- Otsuka America Pharmaceutical, Inc.$178
- Veloxis Pharmaceuticals, Inc.$134
- Travere Therapeutics, Inc.$129
- plus $487 from 8 others
What the payments were for
- Consulting fees$10,46775%
- Travel & lodging$1,49111%
- Food & beverage$1,96514%
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 |
|---|---|---|
| Otsuka Pharmaceutical Development & Commercialization, Inc. | 19 | $9,318 |
| Calliditas Therapeutics US Inc. | 7 | $3,409 |
| Nxstage Medical, Inc. | 4 | $268 |
| Otsuka America Pharmaceutical, Inc. | 2 | $178 |
| Veloxis Pharmaceuticals, Inc. | 1 | $134 |
| Travere Therapeutics, Inc. | 2 | $129 |
| Vifor Pharma, Inc. | 1 | $105 |
| Amgen | 1 | $97 |
| Aurinia Pharma U.S., Inc. | 1 | $90 |
| Bioventus LLC | 2 | $56 |
| Cormedix Inc. | 1 | $46 |
| Vantive US Healthcare LLC | 1 | $44 |
| Grifols USA, LLC | 1 | $32 |
| Baxter Healthcare | 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.
How this compares
$13,923 in reported general payments places this provider in the 80th 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 |
|---|---|---|
| JardianceEmpagliflozin | 218 | $116,840 |
| KerendiaFinerenone | 96 | $90,233 |
| LokelmaSodium Zirconium Cyclosilicate | 32 | $32,079 |
| VeltassaPatiromer Calcium Sorbitex | 13 | $30,358 |
| Sevelamer Carbonate | 61 | $23,205 |
| AuryxiaFerric Citrate | 18 | $16,210 |
| Losartan Potassium | 284 | $4,601 |
| Furosemide | 89 | $2,054 |
| Nifedipine ErNifedipine | 25 | $1,553 |
| Amlodipine Besylate | 108 | $1,547 |
| Calcium Acetate | 17 | $1,463 |
| Calcitriol | 34 | $989 |
| Lisinopril | 54 | $950 |
| Bumetanide | 11 | $845 |
| Chlorthalidone | 62 | $806 |
Paid to pharmacies, not to this prescriber.
Other nephrology in Oakland
- 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.