Carmen Serrano, MD
Neurology · San Juan, PRNPI 1992781595
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $2,800 of the $4,186 with a category attached, or 66.9%. AbbVie accounts for 75.7% of it on its own, with 15 other manufacturers making up the rest. Reporting peaked in 2022 at $3,114 and has fallen 93.0% since, to $218 in 2025.
Across 42 payments — averaging $99.67 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$3K
- AstraZeneca$190
- Novartis$172
- EMD Serono, Inc.$172
- Amneal Pharmaceuticals LLC$146
- Biogen$92
- plus $246 from 10 others
Across 20 payments — averaging $9020.90 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.
- Eli Lilly Export S.A. Puerto Rico Branch$159K
- AbbVie$19K
- Eli Lilly$3K
What the payments were for
- Consulting fees$2,80067%
- Speaking & faculty fees$211%
- Food & beverage$1,36533%
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 |
|---|---|---|
| AbbVie(2 entities) | 11 | $3,169 |
| AstraZeneca | 2 | $190 |
| Novartis | 7 | $172 |
| EMD Serono, Inc. | 2 | $172 |
| Amneal Pharmaceuticals LLC | 3 | $146 |
| Biogen | 4 | $92 |
| Genentech USA, Inc. | 3 | $59 |
| E.r. Squibb & Sons, L.L.C. | 2 | $40 |
| Sanofi | 1 | $25 |
| Catalyst Pharmaceuticals, Inc. | 1 | $25 |
| Acadia Pharmaceuticals Inc | 1 | $23 |
| Acorda Therapeutics, Inc | 1 | $18 |
| Johnson & Johnson | 1 | $16 |
| MDD US Operations, LLC | 1 | $15 |
| Supernus Pharmaceuticals, Inc. | 1 | $14 |
| Medtronic | 1 | $12 |
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.
How this compares
$4,186 in reported general payments places this provider in the 70th percentile of 129 neurology providers in Puerto Rico.
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 |
|---|---|---|
| IngrezzaValbenazine Tosylate | 13 | $107,536 |
| NuplazidPimavanserin Tartrate | 15 | $75,181 |
| RytaryCarbidopa/Levodopa | 65 | $51,915 |
| NeuproRotigotine | 13 | $10,993 |
| Carbidopa-LevodopaCarbidopa/Levodopa | 138 | $4,547 |
| Carbidopa-Levodopa-EntacaponeCarbidopa/Levodopa/Entacapone | 33 | $4,389 |
| Entacapone | 13 | $1,820 |
| Rasagiline Mesylate | 15 | $1,802 |
| Carbidopa-Levodopa ErCarbidopa/Levodopa | 45 | $1,006 |
| Primidone | 22 | $730 |
| Memantine Hcl | 56 | $712 |
| Clonazepam | 41 | $679 |
| RivastigmineRivastigmine Tartrate | 15 | $598 |
| Pramipexole DihydrochloridePramipexole Di-Hcl | 32 | $523 |
| Donepezil Hcl | 53 | $355 |
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 |
|---|---|---|
| Acadia Pharmaceuticals IncNuplazid | $23 | $75,18115 claims |
| Amneal Pharmaceuticals LLCRytary | $146 | $51,91565 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 70th percentile of 129 neurology providers in Puerto Rico.
Other neurology in San Juan
- Franchesca Fiorito-TorresSan Juan$453K
- Mari GarciaSan Juan$138K
- Cristina Cabret-AymatSan Juan$108K
- Gishlaine Alfonso MendezSan Juan$53K
- Carlos Luciano-RomanSan Juan$21K
- Maria Garcia-AyalaSan Juan$10K
- Marisol Mubarak PerdomoSan Juan$10K
- Enrique Rodriguez OlaverriSan Juan$8K
- Ricardo Alvarado MelendezSan Juan$6K
- Hector Miranda DelgadoSan Juan$6K
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.