C Michael Neuwelt, MD
Rheumatology · San Leandro, CANPI 1598786790
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $288,665 of the $357,264 with a category attached, or 80.8%. 25 manufacturers reported payments, led by GSK at 35.9% of the total. Reporting peaked in 2019 at $82,369 and has fallen 60.4% since, to $32,629 in 2025. Among rheumatology clinicians in CA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 755 payments — averaging $473.20 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GSK$128K
- AstraZeneca$119K
- Lilly USA, LLC$61K
- Amgen$36K
- Aurinia Pharma U.S., Inc.$9K
- Johnson & Johnson$1K
- plus $3K from 19 others
Across 121 payments — averaging $13,565 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.
- Astrazeneca UK Limited$608K
- Bristol Myers Squibb$380K
- UCB SA$251K
- GSK$196K
- Janssen Research & Development, LLC$81K
- Pfizer$69K
- plus $57K from 4 others
What the payments were for
- Consulting fees$7,4452%
- Speaking & faculty fees$288,66581%
- Travel & lodging$46,22113%
- Food & beverage$14,8014%
- Education$1320%
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 |
|---|---|---|
| GSK | 148 | $128,147 |
| AstraZeneca(2 entities) | 172 | $119,082 |
| Lilly USA, LLC | 109 | $61,238 |
| Amgen(2 entities) | 119 | $35,723 |
| Aurinia Pharma U.S., Inc. | 20 | $8,617 |
| Johnson & Johnson | 46 | $1,455 |
| UCB, Inc. | 35 | $810 |
| AbbVie | 34 | $679 |
| E.r. Squibb & Sons, L.L.C. | 13 | $292 |
| Pfizer | 13 | $275 |
| Novartis | 12 | $226 |
| Boehringer Ingelheim | 7 | $146 |
| ANI Pharmaceuticals, Inc. | 5 | $116 |
| Organon | 3 | $82 |
| Genentech USA, Inc. | 4 | $77 |
| Bristol Myers Squibb | 3 | $56 |
| Sanofi | 2 | $44 |
| Janssen Scientific Affairs, LLC | 2 | $37 |
| Mallinckrodt Hospital Products Inc. | 2 | $34 |
| Sobi, Inc | 1 | $31 |
| Fidia Pharma USA Inc. | 1 | $28 |
| Invivyd Inc | 1 | $23 |
| Bioventus LLC | 1 | $23 |
| Mallinckrodt Enterprises LLC | 1 | $13 |
| Hikma Pharmaceuticals USA | 1 | $11 |
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
$357,264 in reported general payments places this provider in the 95th percentile of 808 rheumatology providers in California.
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 |
|---|---|---|
| Taltz AutoinjectorIxekizumab | 37 | $282,766 |
| Gammagard LiquidImmun Glob G(Igg)/Gly/Iga Ov50 | 14 | $207,605 |
| Humira PenAdalimumab | 19 | $180,432 |
| BenlystaBelimumab | 28 | $150,637 |
| XeljanzTofacitinib Citrate | 21 | $128,470 |
| Humira(Cf) PenAdalimumab | 12 | $87,360 |
| KevzaraSarilumab | 12 | $50,682 |
| Actemra ActpenTocilizumab | 14 | $40,438 |
| Hydroxychloroquine Sulfate | 298 | $11,370 |
| MethotrexateMethotrexate Sodium | 172 | $5,404 |
| Mycophenolate Mofetil | 35 | $4,787 |
| Prednisone | 411 | $4,706 |
| RestasisCyclosporine | 12 | $3,723 |
| Colchicine | 45 | $3,623 |
| Azathioprine | 47 | $3,427 |
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 |
|---|---|---|
| GSKBenlysta | $128,147 | $150,63728 claims |
| PfizerXeljanz | $275 | $128,47021 claims |
| SanofiKevzara | $44 | $50,68212 claims |
| AbbVieRestasis | $679 | $3,72312 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 95th percentile of 808 rheumatology providers in California.
Other rheumatology in San Leandro
- Sudhakar TumuluriSan Francisco$2.8M
- Ara DikranianSan Diego$2.2M
- Orrin TroumSanta Monica$1.8M
- Robin DoreTustin$1.5M
- Samy MetyasCovina$1.3M
- Rhonda LambertSan Mateo$1.1M
- William ShielMission Viejo$924K
- Mark BoriginiDowney$920K
- Adam KreitenbergTarzana$863K
- Roger KornuTustin$802K
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.