Viet-Nhan Nguyen, DO
Gastroenterology · Raleigh, NCNPI 1902997646
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $1,455 of the $2,081 with a category attached, or 69.9%. Olympus Corporation Of The Americas accounts for 71.5% of it on its own, with 12 other manufacturers making up the rest. Reporting peaked in 2024 at $1,636 and has fallen 98.8% since, to $20 in 2025. That places this record below the midpoint for gastroenterology clinicians in NC, where the typical reported total is $1,694.
Across 37 payments — averaging $56.25 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Olympus Corporation Of The Americas$1K
- AbbVie$175
- Boston Scientific$145
- Conmed Corporation$89
- Takeda Pharmaceuticals U.S.A., Inc.$32
- Merck$28
- plus $126 from 7 others
What the payments were for
- Travel & lodging$1,45570%
- Food & beverage$62630%
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 |
|---|---|---|
| Olympus Corporation Of The Americas | 9 | $1,488 |
| AbbVie | 13 | $175 |
| Boston Scientific | 3 | $145 |
| Conmed Corporation | 1 | $89 |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $32 |
| Merck | 2 | $28 |
| Bristol Myers Squibb | 1 | $24 |
| Pfizer | 1 | $20 |
| Enterra Medical, Inc. | 1 | $20 |
| Gilead | 1 | $18 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 1 | $18 |
| Braintree Laboratories, Inc. | 1 | $13 |
| Amgen | 1 | $13 |
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
$2,081 in reported general payments places this provider in the 50th percentile of 610 gastroenterology providers in North Carolina.
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 |
|---|---|---|
| Pantoprazole Sodium | 58 | $521 |
| Peg 3350-ElectrolyteSodium Chloride/Nahco3/Kcl/Peg | 11 | $245 |
| Ciprofloxacin Hcl | 20 | $48 |
| Omeprazole | 11 | $30 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in Raleigh
- Rig PatelRaleigh$94K
- Alyson JohnsonRaleigh$52K
- Henry VanpalaRaleigh$40K
- Stephen DealCharlotte$945K
- Fred FowlerCharlotte$932K
- Paul WatkinsChapel Hill$876K
- Nilesh LodhiaCharlotte$735K
- Evan DellonChapel Hill$431K
- Robert ReindollarSalisbury$430K
- Andrew StormWinston Salem$426K
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.