Sixto Giusti, MD
Nephrology · Aurora, CONPI 1134413792
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $21,425 of the $22,856 with a category attached, or 93.7%. Mallinckrodt Hospital Products Inc. accounts for 98.6% of it on its own, with 6 other manufacturers making up the rest. Among nephrology clinicians in CO 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 33 payments — averaging $692.60 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Mallinckrodt Hospital Products Inc.$23K
- United Therapeutics Corporation$133
- Vifor Pharma, Inc.$71
- Veloxis Pharmaceuticals, Inc.$49
- Otsuka America Pharmaceutical, Inc.$35
- Shire North American Group Inc$17
- plus $15 from 1 others
Across 2 payments — averaging $89,344 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.
- Mallinckrodt Hospital Products Inc.$179K
What the payments were for
- Speaking & faculty fees$21,42594%
- Travel & lodging$4272%
- Food & beverage$8894%
- Education$740%
- Gifts$410%
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 Hospital Products Inc. | 21 | $22,537 |
| United Therapeutics Corporation | 1 | $133 |
| Vifor Pharma, Inc. | 4 | $71 |
| Veloxis Pharmaceuticals, Inc. | 3 | $49 |
| Otsuka America Pharmaceutical, Inc. | 2 | $35 |
| Shire North American Group Inc | 1 | $17 |
| Eisai Inc. | 1 | $15 |
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$21,874
How this compares
$22,856 in reported general payments places this provider in the 90th percentile of 152 nephrology providers in Colorado.
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 |
|---|---|---|
| Atovaquone | 13 | $7,989 |
| Cinacalcet Hcl | 26 | $5,543 |
| Valganciclovir Hcl | 20 | $2,725 |
| Tacrolimus | 15 | $2,673 |
| Mycophenolic AcidMycophenolate Sodium | 18 | $1,980 |
| Prednisone | 169 | $1,111 |
| Labetalol Hcl | 16 | $904 |
| Atorvastatin Calcium | 82 | $769 |
| Tamsulosin Hcl | 65 | $703 |
| Hydralazine Hcl | 22 | $609 |
| Pantoprazole Sodium | 56 | $583 |
| Carvedilol | 72 | $518 |
| Famotidine | 28 | $422 |
| Omeprazole | 17 | $388 |
| Amlodipine Besylate | 64 | $370 |
Paid to pharmacies, not to this prescriber.
Other nephrology in Aurora
- Richard JohnsonAurora$62K
- Bruce KaplanAurora$42K
- Isaac TeitelbaumAurora$22K
- Charles EdelsteinAurora$13K
- Judith BlaineAurora$9K
- Joshua ThurmanAurora$8K
- Neil ManekAurora$8K
- Gregory ProctorAurora$7K
- Moshe LeviAurora$4K
- Shailendra SharmaAurora$4K
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.