Mariana Markell, MD
Nephrology · Brooklyn, NYNPI 1043204779
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $13,700 of the $15,425 with a category attached, or 88.8%. Mallinckrodt Enterprises LLC accounts for 83.0% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2019 at $12,933 and has fallen 99.8% since, to $27 in 2025. Among nephrology clinicians in NY with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 20 payments — averaging $771.26 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Mallinckrodt Enterprises LLC$13K
- Mallinckrodt Hospital Products Inc.$2K
- Sanofi-aventis U.S. LLC$398
- AstraZeneca$148
- Gilead$96
- OPKO Pharmaceuticals, LLC$29
- plus $47 from 2 others
Across 17 payments — averaging $3478.41 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.
- AbbVie$35K
- Gilead$15K
- Bayer$9K
What the payments were for
- Speaking & faculty fees$13,70089%
- Travel & lodging$6704%
- Food & beverage$9836%
- Education$720%
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 |
|---|---|---|
| Mallinckrodt Enterprises LLC | 10 | $12,808 |
| Mallinckrodt Hospital Products Inc. | 1 | $1,900 |
| Sanofi-aventis U.S. LLC | 3 | $398 |
| AstraZeneca | 2 | $148 |
| Gilead | 1 | $96 |
| OPKO Pharmaceuticals, LLC | 1 | $29 |
| Merck | 1 | $27 |
| Vifor Pharma, Inc. | 1 | $20 |
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.
- ACTHAR$14,543
- THYMOGLOBULIN$398
- LOKELMA$124
How this compares
$15,425 in reported general payments places this provider in the 90th percentile of 935 nephrology providers in New York.
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 |
|---|---|---|
| Envarsus XrTacrolimus | 23 | $16,729 |
| EliquisApixaban | 11 | $13,935 |
| JanuviaSitagliptin Phosphate | 17 | $13,251 |
| Tacrolimus | 26 | $4,153 |
| Cinacalcet Hcl | 11 | $3,719 |
| Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog | 11 | $3,160 |
| Novolog FlexpenInsulin Aspart | 15 | $1,469 |
| Lantus SolostarInsulin Glargine,hum.Rec.Anlog | 17 | $1,464 |
| Esomeprazole Magnesium | 70 | $1,206 |
| Tamsulosin Hcl | 60 | $961 |
| Ultra-Fine Nano Pen NeedlePen Needle, Diabetic | 12 | $867 |
| Labetalol Hcl | 20 | $489 |
| Repaglinide | 12 | $414 |
| Nifedipine ErNifedipine | 20 | $409 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 61 | $371 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| MerckJanuvia | $27 | $13,25117 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 90th percentile of 935 nephrology providers in New York.
Other nephrology in Brooklyn
- Alexander SwanBrooklyn$172K
- George NeidermanBrooklyn$109K
- Gregg MillerBrooklyn$54K
- Kalyana JangaBrooklyn$35K
- Payam ShakouriPoughkeepsie$930K
- Gerald AppelNew York$842K
- Richard ChanNew York$514K
- Bruce SpinowitzBronx$465K
- Steven CocaNew York$445K
- Joseph RoglieriTroy$425K
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.