Kumaraswamy Sivakumar, MD
Neuromuscular Medicine · Phoenix, AZNPI 1821035254
Payments from drug & device makers
Across 542 payments — averaging $7239.76 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- CSL Behring$1.6M
- Janssen Research & Development, LLC$846K
- Sarepta Therapeutics, Inc.$361K
- Amicus Therapeutics, Inc.$286K
- AstraZeneca$217K
- Mitsubishi Tanabe Pharma Development America, Inc.$143K
- plus $508K from 32 others
Across 4 payments — averaging $798.08 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.
- UCB, Inc.$3K
- CSL Behring$433
- Merck Healthcare Kgaa$39
What the payments were for
- Consulting fees$14,27563%
- Speaking & faculty fees$1,5007%
- Travel & lodging$2,97013%
- Food & beverage$3,67316%
- Education$930%
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.
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
Too few neuromuscular medicine providers in Arizonato place this figure against a meaningful peer group, so we don't.
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 |
|---|---|---|
| GammakedImmune Globul G/Gly/Iga Avg 46 | 47 | $1,054,159 |
| Gammagard LiquidImmun Glob G(Igg)/Gly/Iga Ov50 | 67 | $832,555 |
| Radicava OrsEdaravone | 54 | $736,600 |
| OctagamImmun Globg(Igg)/Malt/Iga Ov50 | 32 | $641,368 |
| NuedextaDextromethorphan Hbr/Quinidine | 11 | $19,871 |
| Cyclosporine | 19 | $17,579 |
| Pyridostigmine Bromide ErPyridostigmine Bromide | 23 | $14,511 |
| Cyclosporine ModifiedCyclosporine, Modified | 93 | $14,108 |
| Azathioprine | 148 | $12,344 |
| Pyridostigmine Bromide | 146 | $11,139 |
| Riluzole | 79 | $8,402 |
| Gabapentin | 253 | $5,716 |
| Prednisone | 613 | $5,239 |
| Baclofen | 106 | $3,850 |
| Mycophenolate Mofetil | 16 | $3,148 |
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 |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc.Gammagard Liquid | $136,667 | $832,55567 claims |
| PfizerOctagam | $2,257 | $641,36832 claims |
| AbbVieGengraf | $144 | $67912 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. There are too few neuromuscular medicine providers in Arizonaon file to place this against a meaningful peer group, so we don't.
Other neuromuscular medicine in Phoenix
- Shafeeq LadhaPhoenix$2.5M
- Justine ChanPhoenix$36K
- Ayushi ChughPhoenix$5K
- Timothy FullamPhoenix$2K
- Kathryn BradleyTucson$2K
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.