Walter Chatham
Rheumatology · Las Vegas, NVNPI 1154363315
Payments from drug & device makers
Across 453 payments — averaging $4874.96 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Novartis$452K
- GSK$337K
- E.r. Squibb & Sons, L.L.C.$269K
- Amgen$229K
- Astrazeneca UK Limited$176K
- Janssen Research & Development, LLC$167K
- plus $579K from 30 others
Across 2 payments — averaging $735.54 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Eli Lilly$1K
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 |
|---|---|---|
| Novartis | 17 | $452,024 |
| GSK | 106 | $336,974 |
| E.r. Squibb & Sons, L.L.C. | 14 | $268,948 |
| Amgen(2 entities) | 34 | $229,014 |
| Astrazeneca UK Limited | 14 | $176,361 |
| Janssen Research & Development, LLC | 25 | $166,533 |
| Pfizer | 31 | $120,531 |
| Eli Lilly | 7 | $103,183 |
| Takeda Pharmaceuticals U.S.A., Inc. | 18 | $96,251 |
| Swedish Orphan Biovitrum AB | 15 | $78,418 |
| Sobi, Inc | 39 | $56,959 |
| Aurinia Pharma U.S., Inc. | 46 | $45,596 |
| UCB SA | 17 | $31,786 |
| Genentech, Inc. | 4 | $16,202 |
| Ablynx NV | 2 | $9,994 |
| AstraZeneca(2 entities) | 16 | $5,793 |
| Gilead | 2 | $4,865 |
| EMD Serono, Inc. | 1 | $3,282 |
| Bristol Myers Squibb | 1 | $918 |
| AbbVie | 18 | $888 |
| Seagen Inc. | 1 | $750 |
| Vertex | 1 | $475 |
| Pacira Pharmaceuticals Incorporated | 1 | $400 |
| ZOLL Medical Corporation | 1 | $373 |
| Tersera Therapeutics LLC | 1 | $373 |
| Kyowa Kirin, Inc. | 6 | $370 |
| Boehringer Ingelheim | 3 | $362 |
| UCB, Inc. | 3 | $260 |
| ANI Pharmaceuticals, Inc. | 1 | $119 |
| Sanofi | 1 | $119 |
| Kedrion Biopharma, Inc. | 1 | $96 |
| Lilly USA, LLC | 2 | $55 |
| Mallinckrodt Hospital Products Inc. | 1 | $26 |
| Lundbeck LLC | 1 | $23 |
| Kiniksa Pharmaceuticals International, PLC | 1 | $22 |
| Radius Health, Inc. | 1 | $15 |
How this compares
$2,208,359 in reported general payments places this provider in the 95th percentile of 43 rheumatology providers in Nevada.
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.
Other rheumatology in Las Vegas
- Sandra PagnussatLas Vegas$28.3M
- George KellyLas Vegas$1.1M
- Ewa OlechLas Vegas$297K
- William KimLas Vegas$183K
- Nasim DaoudLas Vegas$109K
- Aida LoudyiLas Vegas$10K
- Tudor JianuLas Vegas$8K
- Khalil Ibrahim BourjiLas Vegas$7K
- Neil BraunsteinLas Vegas$6K
- Michael CliffordLas Vegas$4K
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.