Gretchen Martinez-Alayon, MD
Internal Medicine · Hatillo, PRNPI 1942465661
Payments from drug & device makers
Across 17 payments — averaging $68.93 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- United Therapeutics Corporation$244
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$224
- E.r. Squibb & Sons, L.L.C.$143
- Pfizer$131
- Otsuka America Pharmaceutical, Inc.$123
- AbbVie$110
- plus $198 from 4 others
What the payments were for
- Food & beverage$1,172100%
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 |
|---|---|---|
| United Therapeutics Corporation | 2 | $244 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 2 | $224 |
| E.r. Squibb & Sons, L.L.C. | 1 | $143 |
| Pfizer | 6 | $131 |
| Otsuka America Pharmaceutical, Inc. | 1 | $123 |
| AbbVie | 1 | $110 |
| Boehringer Ingelheim | 1 | $100 |
| Johnson & Johnson | 1 | $50 |
| Esperion Therapeutics, Inc. | 1 | $29 |
| Merck | 1 | $19 |
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
$1,172 in reported general payments places this provider in the 65th percentile of 1,043 internal medicine 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 |
|---|---|---|
| Digoxin | 15 | $322 |
| Atorvastatin Calcium | 24 | $270 |
| ClopidogrelClopidogrel Bisulfate | 14 | $218 |
| CefuroximeCefuroxime Axetil | 11 | $117 |
| Pantoprazole Sodium | 14 | $62 |
| Prednisone | 12 | $32 |
Paid to pharmacies, not to this prescriber.
Other internal medicine in Hatillo
- Elizabeth BarrancoPonce$8M
- Grisell Ortiz LasantaSan Juan$5.9M
- Ruben Santiago-LugoGuaynabo$1.3M
- Nelson VallejoLas Piedras$621K
- Ricardo FernandezSan Juan$480K
- Ronald Collazo PaganManati$206K
- Evelyn Matta FontanetRio Grande$200K
- Angel VinuelaDorado$182K
- Lumen Vera ColonAibonito$179K
- Pedro del Valle de TomasSan Juan$114K
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.