Kambiz Zandi Nejad, MD
Nephrology · Boston, MANPI 1164469789
Payments from drug & device makers
Across 8 payments — averaging $568.86 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Calliditas Therapeutics US Inc.$5K
- Travere Therapeutics, Inc.$51
What the payments were for
- Consulting fees$2,25049%
- Speaking & faculty fees$2,25049%
- Education$511%
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 |
|---|---|---|
| Calliditas Therapeutics US Inc. | 2 | $4,500 |
| Travere Therapeutics, Inc. | 6 | $51 |
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.
- TARPEYO$4,500
How this compares
$4,551 in reported general payments places this provider in the 70th percentile of 339 nephrology providers in Massachusetts.
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 |
|---|---|---|
| Torsemide | 1,068 | $55,531 |
| LokelmaSodium Zirconium Cyclosilicate | 72 | $52,118 |
| JardianceEmpagliflozin | 43 | $35,637 |
| VeltassaPatiromer Calcium Sorbitex | 19 | $23,275 |
| ProcritEpoetin Alfa | 35 | $14,716 |
| RetacritEpoetin Alfa-Epbx | 36 | $12,600 |
| Potassium Citrate ErPotassium Citrate | 32 | $3,723 |
| Calcitriol | 214 | $3,533 |
| Sevelamer Carbonate | 24 | $3,463 |
| Midodrine Hcl | 52 | $2,551 |
| Potassium Chloride | 95 | $2,190 |
| Eplerenone | 20 | $2,148 |
| Losartan Potassium | 185 | $1,934 |
| Lisinopril | 155 | $1,417 |
| Chlorthalidone | 57 | $1,405 |
Paid to pharmacies, not to this prescriber.
Other nephrology in Boston
- David FriedmanBoston$24.5M
- Martin PollakBoston$24.4M
- Dennis AusielloBoston$4.6M
- Subbian KarumanchiBoston$4.1M
- Jamil AzziBoston$1.4M
- Finnian McCauslandBoston$1.2M
- Meghan SiseBoston$1.2M
- Andrew AllegrettiBoston$1.1M
- Ajay SinghBoston$916K
- Ravi ThadhaniBoston$779K
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.