Vivek Manchanda, MD
Pain Medicine · O Fallon, MONPI 1083729941
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 277 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 28 manufacturers, the largest accounting for just 23.4% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2019 at $1,254 and has fallen 59.2% since, to $512 in 2025.
Across 277 payments — averaging $15.04 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Collegium Pharmaceutical, Inc.$976
- Pfizer$626
- AbbVie$526
- Amgen$334
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$312
- Valinor Pharma, LLC$262
- plus $1K from 22 others
What the payments were for
- Food & beverage$4,166100%
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 |
|---|---|---|
| Collegium Pharmaceutical, Inc. | 71 | $976 |
| Pfizer | 54 | $626 |
| AbbVie(2 entities) | 30 | $526 |
| Amgen | 17 | $334 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 20 | $312 |
| Valinor Pharma, LLC | 16 | $262 |
| Boston Scientific | 11 | $193 |
| Scilex Pharmaceuticals Inc. | 12 | $145 |
| Abbott | 7 | $127 |
| Nevro Corp. | 5 | $98 |
| Novartis | 4 | $78 |
| Daiichi Sankyo Inc. | 5 | $68 |
| Stryker | 2 | $43 |
| Sentynl Therapeutics, Inc. | 3 | $41 |
| Medtronic(2 entities) | 2 | $38 |
| Fidia Pharma USA Inc. | 2 | $35 |
| Amneal Pharmaceuticals LLC | 2 | $32 |
| GRT US Holding, Inc. | 2 | $32 |
| MDD US Operations, LLC | 2 | $31 |
| Arbor Pharmaceuticals, Inc. | 2 | $30 |
| Impel Pharmaceuticals Inc. | 1 | $24 |
| Johnson & Johnson | 1 | $23 |
| Vertex | 1 | $21 |
| Azurity Pharmaceuticals, Inc. | 1 | $16 |
| Biodelivery Sciences International, Inc. | 1 | $15 |
| Biohaven Pharmaceuticals, Inc. | 1 | $14 |
| Supernus Pharmaceuticals, Inc. | 1 | $13 |
| Bayer | 1 | $12 |
How this compares
$4,166 in reported general payments places this provider in the 60th percentile of 124 pain medicine providers in Missouri.
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 |
|---|---|---|
| MovantikNaloxegol Oxalate | 153 | $62,071 |
| Xtampza ErOxycodone Myristate | 117 | $55,776 |
| OxycontinOxycodone Hcl | 51 | $17,131 |
| Gabapentin | 973 | $15,627 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 971 | $14,523 |
| Pregabalin | 456 | $12,800 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 386 | $7,534 |
| Duloxetine Hcl | 220 | $4,585 |
| BelbucaBuprenorphine Hcl | 12 | $4,067 |
| Naloxone Hcl | 58 | $3,523 |
| Baclofen | 194 | $2,872 |
| Tramadol Hcl ErTramadol Hcl | 41 | $2,629 |
| Tizanidine Hcl | 179 | $2,276 |
| Lidocaine | 32 | $1,844 |
| Tramadol Hcl | 261 | $1,698 |
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 |
|---|---|---|
| Collegium Pharmaceutical, Inc.Xtampza Er, Belbuca | $976 | $59,843129 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 60th percentile of 124 pain medicine providers in Missouri.
Other pain medicine in O Fallon
- Christopher ReisCape Girardeau$113K
- Anne ChristopherChesterfield$104K
- Tyler ConcannonKansas City$64K
- Vinicius Tieppo FrancioSaint Louis$35K
- Luvell GlantonHannibal$33K
- Jooyoung MaengSaint Louis$25K
- Travis FoxxLiberty$23K
- Nabil AhmadSaint Louis$21K
- Chad SheltonSaint Peters$18K
- Katharine GurbaSaint Louis$18K
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.