Gregorio Guillen, MD
Geriatric Medicine · Perth Amboy, NJNPI 1538252226
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 99.5% of the total across 560 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 40 manufacturers, the largest accounting for just 12.3% — the pattern of someone who eats at a lot of different presentations. Among geriatric medicine clinicians in NJ with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 560 payments — averaging $14.99 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$1K
- Bayer$823
- GSK$753
- Boehringer Ingelheim$736
- AbbVie$712
- Novo Nordisk$693
- plus $4K from 34 others
What the payments were for
- Food & beverage$8,34899%
- Education$461%
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 |
|---|---|---|
| AstraZeneca | 59 | $1,031 |
| Bayer | 43 | $823 |
| GSK | 54 | $753 |
| Boehringer Ingelheim | 52 | $736 |
| AbbVie(2 entities) | 50 | $712 |
| Novo Nordisk | 53 | $693 |
| Amgen | 36 | $526 |
| Novartis | 33 | $470 |
| Pfizer | 19 | $266 |
| Lilly USA, LLC | 18 | $265 |
| Johnson & Johnson | 18 | $242 |
| Exact Sciences | 10 | $203 |
| Corcept Therapeutics | 15 | $193 |
| Amarin Pharma, Inc. | 13 | $185 |
| Ironwood Pharmaceuticals, Inc | 9 | $156 |
| Sanofi-aventis U.S. LLC | 11 | $155 |
| Merck | 10 | $138 |
| Eisai Inc. | 7 | $131 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 9 | $129 |
| Lundbeck LLC | 5 | $78 |
| Ardelyx, Inc. | 4 | $63 |
| Mylan Specialty L.p. | 4 | $62 |
| Takeda Pharmaceuticals U.S.A., Inc. | 6 | $57 |
| Abbott | 3 | $48 |
| Radius Health, Inc. | 2 | $30 |
| Mannkind Corporation | 2 | $29 |
| Nestle Healthcare Nutrition Inc. | 2 | $28 |
| Dexcom, Inc. | 1 | $23 |
| Otsuka America Pharmaceutical, Inc. | 1 | $18 |
| Neurocrine Biosciences, Inc. | 1 | $15 |
| Amphastar Pharmaceuticals, Inc. | 1 | $15 |
| Biogen | 1 | $14 |
| Xeris Pharmaceuticals, Inc. | 1 | $14 |
| BD | 1 | $14 |
| Astellas Pharma US Inc | 1 | $14 |
| Seqirus USA Inc | 1 | $14 |
| Azurity Pharmaceuticals, Inc. | 1 | $14 |
| Ultragenyx Pharmaceutical Inc. | 1 | $14 |
| Scilex Pharmaceuticals Inc. | 1 | $13 |
| Teva Pharmaceuticals USA, Inc. | 1 | $11 |
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.
- FARXIGA$129
How this compares
$8,394 in reported general payments places this provider in the 95th percentile of 165 geriatric medicine providers in New Jersey.
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 |
|---|---|---|
| JardianceEmpagliflozin | 165 | $148,091 |
| FarxigaDapagliflozin Propanediol | 180 | $143,669 |
| JanuviaSitagliptin Phosphate | 153 | $138,791 |
| LinzessLinaclotide | 244 | $137,160 |
| EliquisApixaban | 115 | $98,933 |
| OzempicSemaglutide | 105 | $98,121 |
| KerendiaFinerenone | 127 | $90,660 |
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 83 | $61,618 |
| JanumetSitagliptin Phos/Metformin Hcl | 71 | $61,610 |
| TradjentaLinagliptin | 57 | $44,126 |
| EntrestoSacubitril/Valsartan | 42 | $30,662 |
| Omeprazole-Sodium BicarbonateOmeprazole/Sodium Bicarbonate | 14 | $30,300 |
| Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog | 91 | $29,002 |
| ProliaDenosumab | 17 | $28,926 |
| XareltoRivaroxaban | 37 | $28,608 |
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 |
|---|---|---|
| MerckJanuvia, Janumet, Janumet Xr | $138 | $224,806255 claims |
| Boehringer IngelheimJardiance, Tradjenta, Synjardy | $736 | $200,174236 claims |
| AbbVieLinzess, Namzaric, Creon | $712 | $178,617302 claims |
| AstraZenecaFarxiga, Brilinta | $1,031 | $147,575192 claims |
| Novo NordiskOzempic, Rybelsus | $693 | $124,896127 claims |
| PfizerEliquis | $266 | $98,933115 claims |
| BayerKerendia | $823 | $90,660127 claims |
| GSKTrelegy Ellipta, Breo Ellipta, Anoro Ellipta | $753 | $88,429147 claims |
| NovartisEntresto | $470 | $30,66242 claims |
| AmgenProlia | $526 | $28,92617 claims |
| Johnson & JohnsonXarelto | $242 | $28,60837 claims |
| Lilly USA, LLCMounjaro | $265 | $17,73517 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 95th percentile of 165 geriatric medicine providers in New Jersey.
Other geriatric medicine in Perth Amboy
- Albert RiddleHaworth$524K
- Gamil MakarClifton$82K
- Joshua Shua HaimManchester$45K
- Pradip ShahWest Caldwell$27K
- Ketankumar VaidyaEdison$8K
- Cheng-An MaoClifton$8K
- Theresa RedlingLivingston$7K
- Sarita RastogiHackensack$7K
- Leslie FeiginDenville$7K
- Karambir DalalWhiting$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.