Christopher Loh, MD
Diagnostic Radiology · Santa Monica, CANPI 1720044183
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $104,900 of the $121,247 with a category attached, or 86.5%. Sirtex Medical Inc accounts for 97.0% of it on its own, with 17 other manufacturers making up the rest. Reporting peaked in 2019 at $80,716 and has fallen 99.3% since, to $525 in 2025. Among diagnostic radiology 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 232 payments — averaging $522.62 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Sirtex Medical Inc$118K
- Penumbra, Inc.$2K
- Medtronic$235
- Imperative Care, Inc$190
- BD$174
- Balt USA, LLC$140
- plus $517 from 12 others
Across 5 payments — averaging $3301.32 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.
- Penumbra, Inc.$17K
What the payments were for
- Speaking & faculty fees$104,90087%
- Travel & lodging$12,55710%
- Food & beverage$3,7903%
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 |
|---|---|---|
| Sirtex Medical Inc | 197 | $117,581 |
| Penumbra, Inc. | 3 | $2,411 |
| Medtronic(2 entities) | 7 | $235 |
| Imperative Care, Inc | 2 | $190 |
| BD | 2 | $174 |
| Balt USA, LLC | 1 | $140 |
| Terumo Medical Corporation | 4 | $97 |
| Inari Medical, Inc. | 2 | $81 |
| Mozarc Medical US LLC | 2 | $65 |
| Cardiovascular Systems Inc. | 3 | $59 |
| Medical Device Business Services, Inc. | 1 | $47 |
| Bard Access Systems, Inc. | 1 | $47 |
| Bard Peripheral Vascular, Inc. | 1 | $26 |
| Lemaitre Vascular, Inc. | 2 | $26 |
| Boston Scientific | 1 | $20 |
| Argon Medical Devices, Inc. | 1 | $20 |
| Tactile Systems Technology Inc | 1 | $15 |
| E.r. Squibb & Sons, L.L.C. | 1 | $14 |
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
$121,247 in reported general payments places this provider in the 95th percentile of 3,537 diagnostic radiology 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 diagnostic radiology in Santa Monica
- Ira SmalbergSanta Monica$451K
- Murray ReicherSan Diego$10.5M
- Agnes SantosaSan Diego$884K
- Robert SuhLos Angeles$758K
- Jonathan ChungSan Diego$747K
- Gary UlanerLos Angeles$687K
- Garry GoldStanford$528K
- Michael TrambertSanta Barbara$499K
- Michael DakeStanford$492K
- Yingbing WangSan Francisco$403K
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.