Carlo Castillo, DO
Nephrology · Huntsville, ALNPI 1518176031
Payments from drug & device makers
Across 506 payments — averaging $911.56 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Alnylam Pharmaceuticals Inc.$146K
- CSL Behring$97K
- Boehringer Ingelheim International GmbH$83K
- Boehringer Ingelheim Pharma GmbH & Co.kg$80K
- Novartis$49K
- Amgen$816
- plus $6K from 28 others
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 |
|---|---|---|
| Alnylam Pharmaceuticals Inc. | 73 | $146,242 |
| CSL Behring | 42 | $96,667 |
| Boehringer Ingelheim International GmbH | 12 | $82,589 |
| Boehringer Ingelheim Pharma GmbH & Co.kg | 1 | $80,124 |
| Novartis | 27 | $48,868 |
| Amgen(2 entities) | 28 | $816 |
| Vifor Pharma, Inc. | 43 | $759 |
| Bayer | 23 | $681 |
| OPKO Pharmaceuticals, LLC | 72 | $651 |
| Calliditas Therapeutics US Inc. | 20 | $509 |
| AstraZeneca(2 entities) | 32 | $507 |
| Otsuka America Pharmaceutical, Inc. | 27 | $464 |
| GSK | 16 | $326 |
| Akebia Therapeutics Inc | 9 | $300 |
| Boehringer Ingelheim | 13 | $287 |
| Aurinia Pharma U.S., Inc. | 11 | $270 |
| Travere Therapeutics, Inc. | 15 | $227 |
| Ardelyx, Inc. | 5 | $206 |
| Novo Nordisk | 6 | $144 |
| Lilly USA, LLC | 5 | $101 |
| Mallinckrodt Hospital Products Inc. | 3 | $69 |
| Ultragenyx Pharmaceutical Inc. | 3 | $60 |
| Medtronic | 2 | $60 |
| Apellis Pharmaceuticals, Inc. | 3 | $55 |
| Fresenius USA Marketing, Inc. | 3 | $45 |
| Cycle Pharmaceuticals Inc | 2 | $42 |
| Daiichi Sankyo Inc. | 2 | $33 |
| ANI Pharmaceuticals, Inc. | 1 | $32 |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $27 |
| AMAG Pharmaceuticals, Inc. | 1 | $23 |
| Shire North American Group Inc | 1 | $17 |
| Mallinckrodt Enterprises LLC | 1 | $16 |
| Genentech USA, Inc. | 1 | $16 |
| Kyowa Kirin, Inc. | 1 | $15 |
How this compares
$461,248 in reported general payments places this provider in the 95th percentile of 164 nephrology providers in Alabama.
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 nephrology in Huntsville
- David TietjenHuntsville$2.6M
- Michael QuadriniHuntsville$1.3M
- David BainsHuntsville$856K
- James SmelserHuntsville$172K
- Roger CoomerHuntsville$93K
- Todd BroomeHuntsville$7K
- Heather HaleyHuntsville$6K
- Saad RahmanHuntsville$6K
- Dana RizkBirmingham$2.6M
- Eric WallaceBirmingham$1.3M
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.