Mamatha Chivukula, MD
Anatomic Pathology & Clinical Pathology · San Francisco, CANPI 1750353280
Payments from drug & device makers
Across 44 payments — averaging $877.80 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$29K
- Astellas Pharma US Inc$6K
- Roche Diagnostics Corporation$3K
- AstraZeneca$1K
- Genentech USA, Inc.$60
- Stemline Therapeutics Inc.$41
What the payments were for
- Consulting fees$34,10788%
- Travel & lodging$3,1228%
- Food & beverage$1,3934%
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 | 20 | $28,777 |
| Astellas Pharma US Inc | 9 | $5,516 |
| Roche Diagnostics Corporation | 3 | $3,104 |
| AstraZeneca | 7 | $1,125 |
| Genentech USA, Inc. | 4 | $60 |
| Stemline Therapeutics Inc. | 1 | $41 |
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
$38,623 in reported general payments places this provider in the 90th percentile of 814 anatomic pathology & clinical pathology providers in California.
See all anatomic pathology & clinical pathology 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.
Other anatomic pathology & clinical pathology in San Francisco
- Alexander BorowskySan Francisco$778K
- Dianna NgSan Francisco$118K
- Georgios DeftereosSan Francisco$57K
- Serge AlexanianLos Angeles$3.2M
- Cynthia BehlingSan Diego$1.1M
- Michael LewisLos Angeles$1.1M
- Benjamin PinskyStanford$673K
- Brian ConeLos Angeles$519K
- John BlausteinSanta Barbara$464K
- Henry TsaiHuntington Beach$414K
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.