Christopher Comstock, MD
Diagnostic Radiology · San Diego, CANPI 1174554539
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $30,441 of the $31,931 with a category attached, or 95.3%. 9 manufacturers reported payments, led by Bayer at 39.1% of the total. Reporting peaked in 2022 at $13,241 and has fallen 98.6% since, to $180 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 21 payments — averaging $1520.53 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Bayer$12K
- Bracco Diagnostics Inc.$6K
- Hologic Inc$6K
- Bayer Healthcare LLC$6K
- Guerbet LLC$750
- GE HealthCare$242
- plus $149 from 3 others
Across 37 payments — averaging $22,118 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.
- GE HealthCare$818K
What the payments were for
- Consulting fees$30,44195%
- Travel & lodging$6202%
- Food & beverage$8703%
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 |
|---|---|---|
| Bayer | 2 | $12,491 |
| Bracco Diagnostics Inc. | 5 | $6,282 |
| Hologic Inc | 3 | $6,138 |
| Bayer Healthcare LLC | 4 | $5,879 |
| Guerbet LLC | 1 | $750 |
| GE HealthCare | 3 | $242 |
| Stryker | 1 | $82 |
| Olea Medical | 1 | $44 |
| Hologic Sales And Service, LLC | 1 | $23 |
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.
- 3Dimensions$6,072
- MULTIHANCE$4,782
- ISOVUE$1,500
- PROHANCE$1,000
- ELUCIREM$750
- Gadavist$150
How this compares
$31,931 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 San Diego
- Murray ReicherSan Diego$10.5M
- Agnes SantosaSan Diego$884K
- Jonathan ChungSan Diego$747K
- Jordan ZieglerSan Diego$142K
- Vishal VermaSan Diego$133K
- Gregg AlzateSan Diego$111K
- Michael DavisSan Diego$93K
- Mark SchechterSan Diego$57K
- Giuseppe AmmiratiSan Diego$44K
- John JohnsonSan Diego$41K
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.