Andres Serrano, MD
Nephrology · Chicago, ILNPI 1336354562
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 97.3% of the total across 87 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 17 manufacturers reported payments, led by Fresenius USA Marketing, Inc. at 30.6% of the total.
Across 87 payments — averaging $22.40 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Fresenius USA Marketing, Inc.$597
- Amgen$240
- AstraZeneca$203
- Otsuka America Pharmaceutical, Inc.$139
- Travere Therapeutics, Inc.$130
- Vifor Pharma, Inc.$122
- plus $518 from 11 others
Across 4 payments — averaging $2462.20 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.
- Baxter Healthcare$10K
What the payments were for
- Food & beverage$1,89597%
- Education$533%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Fresenius USA Marketing, Inc. | 28 | $597 |
| Amgen(2 entities) | 10 | $240 |
| AstraZeneca | 8 | $203 |
| Otsuka America Pharmaceutical, Inc. | 6 | $139 |
| Travere Therapeutics, Inc. | 12 | $130 |
| Vifor Pharma, Inc. | 1 | $122 |
| Vantive US Healthcare LLC | 1 | $84 |
| Akebia Therapeutics Inc | 4 | $79 |
| Calliditas Therapeutics US Inc. | 3 | $76 |
| Boehringer Ingelheim | 4 | $66 |
| Baxter Healthcare | 3 | $60 |
| Lilly USA, LLC | 2 | $40 |
| Alcon | 1 | $29 |
| Aurinia Pharma U.S., Inc. | 1 | $28 |
| Ardelyx, Inc. | 1 | $25 |
| Novartis | 1 | $15 |
| Merck | 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.
- Veltassa$122
How this compares
$1,949 in reported general payments places this provider in the 65th percentile of 524 nephrology providers in Illinois.
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 |
|---|---|---|
| FarxigaDapagliflozin Propanediol | 67 | $56,139 |
| JardianceEmpagliflozin | 30 | $19,144 |
| LokelmaSodium Zirconium Cyclosilicate | 25 | $18,127 |
| Sevelamer Carbonate | 40 | $13,385 |
| TradjentaLinagliptin | 12 | $5,468 |
| Nifedipine ErNifedipine | 31 | $872 |
| Losartan Potassium | 47 | $427 |
| Calcitriol | 41 | $415 |
| Furosemide | 54 | $376 |
| Lisinopril | 25 | $223 |
| Pantoprazole Sodium | 11 | $170 |
| Carvedilol | 23 | $153 |
| Atorvastatin Calcium | 17 | $151 |
| Gabapentin | 19 | $149 |
| Amlodipine Besylate | 29 | $136 |
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 |
|---|---|---|
| AstraZenecaFarxiga, Lokelma | $203 | $74,26692 claims |
| Boehringer IngelheimJardiance, Tradjenta | $66 | $24,61242 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 65th percentile of 524 nephrology providers in Illinois.
Other nephrology in Chicago
- Myles WolfChicago$2.1M
- Susan QuagginChicago$262K
- Nicole StankusChicago$235K
- Marco BonillaChicago$148K
- Lorenzo GallonChicago$120K
- Vikram AggarwalChicago$117K
- Jay KoynerChicago$113K
- Jose ArrudaChicago$107K
- John FriedewaldChicago$93K
- Casey GashtiChicago$74K
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.