Vivien To, MD
Adult Medicine · Columbia, MDNPI 1245334408
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 98.9% of the total across 63 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 19 manufacturers, the largest accounting for just 15.2% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2019 at $607 and has fallen 73.3% since, to $162 in 2024.
Across 63 payments — averaging $16.16 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$155
- Tarsus Pharmaceuticals, Inc.$147
- Pfizer$136
- Amgen$80
- AstraZeneca$62
- Takeda Pharmaceuticals U.S.A., Inc.$57
- plus $382 from 13 others
What the payments were for
- Food & beverage$1,00799%
- Education$121%
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 |
|---|---|---|
| Merck | 16 | $155 |
| Tarsus Pharmaceuticals, Inc. | 1 | $147 |
| Pfizer | 10 | $136 |
| Amgen | 5 | $80 |
| AstraZeneca | 5 | $62 |
| Takeda Pharmaceuticals U.S.A., Inc. | 4 | $57 |
| Amarin Pharma, Inc. | 3 | $55 |
| Teva Pharmaceuticals USA, Inc. | 3 | $47 |
| AbbVie(2 entities) | 2 | $44 |
| GSK | 2 | $39 |
| Sanofi-aventis U.S. LLC | 2 | $38 |
| Biohaven Pharmaceutical Holding Company Ltd. | 2 | $32 |
| Novo Nordisk | 2 | $31 |
| Daiichi Sankyo Inc. | 1 | $25 |
| Boehringer Ingelheim | 1 | $23 |
| Exact Sciences | 1 | $15 |
| Smith+Nephew | 1 | $12 |
| Medtronic | 1 | $11 |
| Currax Pharmaceuticals LLC | 1 | $11 |
How this compares
$1,018 in reported general payments places this provider in the 80th percentile of 34 adult medicine providers in Maryland.
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 | 20 | $30,609 |
| FarxigaDapagliflozin Propanediol | 14 | $22,679 |
| EliquisApixaban | 13 | $13,326 |
| Atorvastatin Calcium | 119 | $1,333 |
| Bupropion XlBupropion Hcl | 28 | $1,312 |
| Levothyroxine Sodium | 81 | $1,099 |
| Valsartan | 16 | $1,091 |
| Gabapentin | 38 | $855 |
| Diclofenac Sodium | 25 | $662 |
| Pantoprazole Sodium | 28 | $567 |
| Escitalopram Oxalate | 26 | $505 |
| Amlodipine Besylate | 73 | $496 |
| Simvastatin | 19 | $484 |
| Pravastatin Sodium | 26 | $482 |
| Azelastine Hcl | 18 | $457 |
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 | $31 | $30,60920 claims |
| AstraZenecaFarxiga | $62 | $22,67914 claims |
| PfizerEliquis | $136 | $13,32613 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 80th percentile of 34 adult medicine providers in Maryland.
Other adult medicine in Columbia
- Hope HonigsbergColumbia$537
- Derek McCoyBel Air$3K
- Mikhail GendelGaithersburg$3K
- Joyce SunRockville$3K
- Achankunj ChackoTakoma Park$2K
- Holly HooverCumberland$1K
- Tracy TurnerAnnapolis$1K
- Kamakshi BaigWhite Plains$810
- Elsie KamaraGermantown$788
- Asha ValiSilver Spring$692
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.