Roberto Santiago, MD
Radiation Oncology · Bayamon, PRNPI 1710025762
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $16,250 of the $21,629 with a category attached, or 75.1%. Varian Medical Systems, Inc. accounts for 71.3% of it on its own, with 9 other manufacturers making up the rest. Reporting peaked in 2019 at $9,919 and has fallen 84.1% since, to $1,582 in 2025.
Across 43 payments — averaging $503.01 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Varian Medical Systems, Inc.$15K
- Merck$4K
- Elekta, Inc.$1K
- Boston Scientific$414
- Novocure Inc.$267
- Novartis$156
- plus $238 from 4 others
What the payments were for
- Consulting fees$1,5007%
- Speaking & faculty fees$16,25075%
- Travel & lodging$1,2396%
- Food & beverage$2,54912%
- Education$350%
- Gifts$560%
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 |
|---|---|---|
| Varian Medical Systems, Inc. | 13 | $15,414 |
| Merck | 7 | $4,034 |
| Elekta, Inc. | 10 | $1,106 |
| Boston Scientific | 4 | $414 |
| Novocure Inc. | 2 | $267 |
| Novartis | 2 | $156 |
| Johnson & Johnson | 1 | $125 |
| Medtec LLC | 1 | $56 |
| Pfizer | 2 | $35 |
| Siemens Medical Solutions USA, Inc. | 1 | $22 |
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.
- ELEKTA MEDICAL LINEAR ACCELERATOR$2,504
- KEYTRUDA$2,250
- Clarity$533
- Oncology$267
- GENERAL - THERAPIES$266
- Radiation Oncology$260
- PLUVICTO$131
- LEKSELL GAMMA KNIFE ICON$129
- LEKSELL GAMMA KNIFE PERFEXION$129
- LEKSELL GAMMAPLAN$129
- Leksell Stereotactic System$129
- LEKSELL VANTAGE STEREOTACTIC SYSTEM$129
- Erleada$125
- SPACEOAR$124
How this compares
Too few radiation oncology providers in Puerto Ricoto place this figure against a meaningful peer group, so we don't.
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 |
|---|---|---|
| Tamsulosin Hcl | 34 | $410 |
| Ciprofloxacin Hcl | 26 | $198 |
| Tramadol Hcl | 11 | $105 |
| Methylprednisolone | 12 | $98 |
| Gabapentin | 13 | $75 |
| Lorazepam | 15 | $34 |
Paid to pharmacies, not to this prescriber.
Other radiation oncology in Bayamon
- Francisco Cordero-GallardoBayamon$638
- Alberto Cerra FrancoBayamon$500
- Luisa Marcial VegaBayamon$97
- Carlos ChevereRio Piedras$8K
- Julio DiazRio Piedras$7K
- Javier Lopez AraujoDorado$2K
- Jose SantanaSan Juan$628
- Joshua Rodriguez-LopezSan Juan$593
- Ricardo Lopez MujicaManati$257
- Marisol Rodriguez HernandezSan Juan$244
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.