Vicente Lam Siu, MD
Internal Medicine · San Angelo, TXNPI 1497958862
Payments from drug & device makers
Across 64 payments — averaging $17.67 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Pfizer$136
- Novartis$119
- Merck$104
- Novo Nordisk$98
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$89
- Amgen$85
- plus $501 from 16 others
What the payments were for
- Food & beverage$1,131100%
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 |
|---|---|---|
| Pfizer | 8 | $136 |
| Novartis | 6 | $119 |
| Merck | 5 | $104 |
| Novo Nordisk | 7 | $98 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 6 | $89 |
| Amgen | 4 | $85 |
| Lilly USA, LLC | 5 | $78 |
| Boehringer Ingelheim | 4 | $67 |
| Ultragenyx Pharmaceutical Inc. | 2 | $40 |
| AstraZeneca | 2 | $37 |
| E.r. Squibb & Sons, L.L.C. | 2 | $37 |
| AbbVie(2 entities) | 2 | $37 |
| Valeritas, Inc. | 1 | $27 |
| Amarin Pharma, Inc. | 2 | $26 |
| Inspire Medical Systems, Inc. | 1 | $22 |
| Shire North American Group Inc | 1 | $22 |
| Seqirus USA Inc | 1 | $21 |
| GSK | 1 | $19 |
| Radius Health, Inc. | 1 | $19 |
| Sanofi-aventis U.S. LLC | 1 | $18 |
| Melinta Therapeutics, LLC | 1 | $18 |
| Exact Sciences | 1 | $14 |
How this compares
$1,131 in reported general payments places this provider in the 70th percentile of 7,675 internal medicine providers in Texas.
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 |
|---|---|---|
| OzempicSemaglutide | 150 | $200,668 |
| EliquisApixaban | 132 | $122,225 |
| JardianceEmpagliflozin | 45 | $52,066 |
| JanuviaSitagliptin Phosphate | 46 | $42,931 |
| MounjaroTirzepatide | 25 | $41,488 |
| TrulicityDulaglutide | 24 | $37,027 |
| MyrbetriqMirabegron | 32 | $29,120 |
| TradjentaLinagliptin | 21 | $22,835 |
| XareltoRivaroxaban | 15 | $22,480 |
| Toujeo SolostarInsulin Glargine,hum.Rec.Anlog | 18 | $20,543 |
| LinzessLinaclotide | 17 | $19,319 |
| FarxigaDapagliflozin Propanediol | 17 | $16,739 |
| Bydureon BciseExenatide Microspheres | 18 | $14,343 |
| Breztri AerosphereBudesonide/Glycopyr/Formoterol | 16 | $11,520 |
| Lantus SolostarInsulin Glargine,hum.Rec.Anlog | 44 | $10,804 |
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 |
|---|---|---|
| Novo NordiskOzempic | $98 | $200,668150 claims |
| PfizerEliquis | $136 | $122,225132 claims |
| Boehringer IngelheimJardiance, Tradjenta, Combivent Respimat | $67 | $85,37086 claims |
| Lilly USA, LLCMounjaro, Trulicity | $78 | $78,51649 claims |
| MerckJanuvia | $104 | $42,93146 claims |
| AstraZenecaFarxiga, Breztri Aerosphere, Symbicort | $37 | $36,83357 claims |
| AbbVieLinzess, Restasis Multidose | $37 | $27,34229 claims |
| GSKBreo Ellipta, Incruse Ellipta | $19 | $12,09035 claims |
| Sanofi-aventis U.S. LLCLantus | $18 | $2,86414 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 7,675 internal medicine providers in Texas.
Other internal medicine in San Angelo
- Jan BurgerHouston$47.3M
- Nitin JainHouston$33.2M
- Muhammad IrfanTomball$30.6M
- Aung NaingHouston$30.6M
- Robert BassSan Antonio$25.6M
- Preetesh JainHouston$19.5M
- Paolo StratiHouston$19.2M
- Hernan SalazarSan Antonio$18.5M
- Nicholas ShortHouston$17.6M
- Salma SaigerMesquite$16.1M
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.