Chet Tharpe, MD
Allergy · Venice, CANPI 1053541581
Payments from drug & device makers
Across 14 payments — averaging $13.64 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Sanofi-aventis U.S. LLC$47
- GSK$28
- Genentech USA, Inc.$27
- Sanofi$24
- Alk-abello, Inc$16
- Bio Products Laboratory USA, Inc.$15
- plus $34 from 3 others
What the payments were for
- Food & beverage$191100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Sanofi-aventis U.S. LLC | 3 | $47 |
| GSK | 2 | $28 |
| Genentech USA, Inc. | 2 | $27 |
| Sanofi | 2 | $24 |
| Alk-abello, Inc | 1 | $16 |
| Bio Products Laboratory USA, Inc. | 1 | $15 |
| Grifols USA, LLC | 1 | $12 |
| AstraZeneca | 1 | $12 |
| Pfizer | 1 | $11 |
How this compares
$191 in reported general payments places this provider in the 20th percentile of 117 allergy 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 |
|---|---|---|
| DescovyEmtricitabine/Tenofov Alafenam | 549 | $1,120,311 |
| BiktarvyBictegrav/Emtricit/Tenofov Ala | 15 | $54,807 |
| Emtricitabine-Tenofovir DisopEmtricitabine/Tenofovir (Tdf) | 193 | $13,116 |
| Epinephrine | 27 | $3,864 |
| Doxycycline Hyclate | 18 | $281 |
Paid to pharmacies, not to this prescriber.
Other allergy in Venice
- Ricardo TanLos Angeles$11.2M
- Joshua JacobsWalnut Creek$5.1M
- Warner CarrLaguna Niguel$2.4M
- William BergerMission Viejo$976K
- Robert ZeigerSan Diego$722K
- Bradley ChippsSacramento$712K
- Travis MillerRoseville$277K
- Sarah FieldOrange$271K
- Jonathan TamLos Angeles$222K
- Sandra ChristiansenSan Diego$74K
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.