James Mangan, MD
Hematology & Oncology · San Diego, CANPI 1720107121
Payments from drug & device makers
Across 83 payments — averaging $9232.74 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$517K
- Amgen$128K
- Otsuka Pharmaceutical Co., Ltd.$44K
- Astellas Pharma US Inc$22K
- Novartis$12K
- Acceleron Pharma, Inc.$7K
- plus $37K from 13 others
What the payments were for
- Consulting fees$25,13241%
- Speaking & faculty fees$28,35546%
- Travel & lodging$6,26910%
- Food & beverage$1,4172%
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 |
|---|---|---|
| Merck | 3 | $516,724 |
| Amgen | 3 | $128,183 |
| Otsuka Pharmaceutical Co., Ltd. | 7 | $44,389 |
| Astellas Pharma US Inc | 25 | $21,746 |
| Novartis | 1 | $11,548 |
| Acceleron Pharma, Inc. | 4 | $7,010 |
| Bristol Myers Squibb | 2 | $6,376 |
| Syndax Pharmaceuticals, Inc. | 6 | $5,614 |
| Gilead | 3 | $4,860 |
| Daiichi Sankyo Inc. | 7 | $4,743 |
| Agios Pharmaceuticals, Inc. | 9 | $4,018 |
| Rigel Pharmaceuticals, Inc. | 4 | $3,456 |
| Jazz Pharmaceuticals Inc. | 1 | $2,480 |
| Pfizer | 1 | $2,250 |
| CTI Biopharma Corp. | 1 | $1,725 |
| AstraZeneca | 2 | $682 |
| Taiho Oncology, Inc. | 2 | $435 |
| AbbVie | 1 | $54 |
| Abbott | 1 | $24 |
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
$766,317 in reported general payments places this provider in the 85th percentile of 1,363 hematology & oncology 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 |
|---|---|---|
| JakafiRuxolitinib Phosphate | 46 | $599,519 |
| RevlimidLenalidomide | 32 | $541,617 |
| XospataGilteritinib Fumarate | 22 | $473,714 |
| PromactaEltrombopag Olamine | 11 | $332,505 |
| RezurockBelumosudil Mesylate | 19 | $324,241 |
| RydaptMidostaurin | 11 | $238,550 |
| ImbruvicaIbrutinib | 13 | $158,706 |
| VenclextaVenetoclax | 27 | $109,005 |
| Posaconazole | 26 | $27,787 |
| EliquisApixaban | 22 | $13,836 |
| Acyclovir | 133 | $3,259 |
| Dapsone | 23 | $1,636 |
| Budesonide EcBudesonide | 15 | $1,500 |
| Imatinib Mesylate | 16 | $1,477 |
| Fluconazole | 16 | $884 |
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 |
|---|---|---|
| NovartisPromacta, Rydapt | $11,548 | $571,05522 claims |
| Bristol Myers SquibbRevlimid | $6,376 | $541,61732 claims |
| Astellas Pharma US IncXospata | $21,746 | $473,71422 claims |
| AbbVieVenclexta | $54 | $109,00527 claims |
| PfizerEliquis | $2,250 | $13,83622 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 85th percentile of 1,363 hematology & oncology providers in California.
Other hematology & oncology in San Diego
- Caitlin CostelloSan Diego$16.9M
- Rana McKaySan Diego$15.3M
- Sandip PatelSan Diego$11.6M
- Adam BurgoyneSan Diego$6.8M
- Lyudmila BazhenovaSan Diego$6.5M
- Charles RedfernSan Diego$6.3M
- Ezra CohenSan Diego$5.5M
- Gregory DanielsSan Diego$4.4M
- Alain AlgaziSan Francisco$119.2M
- David BerzLos Angeles$43.3M
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.