Robert Walker, MD
Emergency Medicine · Brookhaven, MSNPI 1225205313
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 36 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 12 manufacturers reported payments, led by Novo Nordisk at 47.8% of the total. Reporting peaked in 2022 at $206 and has fallen 59.1% since, to $84 in 2025. Among emergency medicine clinicians in MS with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 36 payments — averaging $19.82 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Novo Nordisk$341
- Pfizer$120
- 180 Medical, Inc.$44
- Corium, LLC$44
- Philips North America LLC$31
- Merck$28
- plus $105 from 6 others
What the payments were for
- Food & beverage$714100%
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 |
|---|---|---|
| Novo Nordisk | 22 | $341 |
| Pfizer | 1 | $120 |
| 180 Medical, Inc. | 1 | $44 |
| Corium, LLC | 2 | $44 |
| Philips North America LLC | 2 | $31 |
| Merck | 2 | $28 |
| Phathom Pharmaceuticals, Inc. | 1 | $21 |
| Impactortho, Inc. | 1 | $19 |
| ITI, Inc. (d/b/a Intra-cellular Therapies, Inc.) | 1 | $18 |
| Sanofi-aventis U.S. LLC | 1 | $17 |
| Global Blood Therapeutics, Inc. | 1 | $16 |
| Lilly USA, LLC | 1 | $14 |
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.
- LYRICA$120
How this compares
$714 in reported general payments places this provider in the 90th percentile of 443 emergency medicine providers in Mississippi.
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 |
|---|---|---|
| LinzessLinaclotide | 23 | $11,792 |
| Cefdinir | 42 | $828 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 41 | $289 |
| Metoprolol Succinate | 18 | $286 |
| Sucralfate | 14 | $266 |
| Gabapentin | 15 | $207 |
| Ketorolac Tromethamine | 11 | $189 |
| Esomeprazole Magnesium | 11 | $171 |
| Atorvastatin Calcium | 41 | $140 |
| Pregabalin | 14 | $129 |
| Ondansetron OdtOndansetron | 17 | $101 |
| Losartan Potassium | 20 | $101 |
| Prednisone | 40 | $83 |
| Methocarbamol | 11 | $78 |
| Alprazolam | 17 | $67 |
Paid to pharmacies, not to this prescriber.
Other emergency medicine in Brookhaven
- Stanley ThompsonSouthaven$466K
- Utsav NandiJackson$54K
- Richard SummersJackson$20K
- Damon DarseyJackson$11K
- Kenneth WhittingtonHazlehurst$8K
- Samuel Richardson IiiJackson$8K
- Joseph PongettiJackson$5K
- Robert WalkerHazlehurst$5K
- Salvador ArceoBrandon$5K
- Manuel OngCarthage$5K
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.