Callan Mason, MD
Diagnostic Radiology · Oklahoma City, OKNPI 1427315597
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $1,230 of the $1,330 with a category attached, or 92.5%. GE HealthCare accounts for 92.5% of it on its own, with 6 other manufacturers making up the rest. Reporting peaked in 2022 at $1,230 and has fallen 97.6% since, to $29 in 2025. Among diagnostic radiology clinicians in OK with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 7 payments — averaging $190.02 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GE HealthCare$1K
- Tempus AI, Inc$29
- Leica Microsystems Inc.$18
- Eisai Inc.$16
- Puma Biotechnology, Inc.$13
- Seagen Inc.$13
- plus $11 from 1 others
What the payments were for
- Travel & lodging$1,23092%
- Food & beverage$1008%
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 |
|---|---|---|
| GE HealthCare | 1 | $1,230 |
| Tempus AI, Inc | 1 | $29 |
| Leica Microsystems Inc. | 1 | $18 |
| Eisai Inc. | 1 | $16 |
| Puma Biotechnology, Inc. | 1 | $13 |
| Seagen Inc. | 1 | $13 |
| Siemens Medical Solutions USA, Inc. | 1 | $11 |
How this compares
$1,330 in reported general payments places this provider in the 90th percentile of 296 diagnostic radiology providers in Oklahoma.
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 Oklahoma City
- Bryan VanzandtOklahoma City$26K
- Anthony AllemanOklahoma City$14K
- Maunil ShethOklahoma City$8K
- Matthew OrgelOklahoma City$7K
- Kyle SierraOklahoma City$6K
- Sean DuguayOklahoma City$5K
- Dan NguyenOklahoma City$5K
- Nathan ElfrinkOklahoma City$3K
- Harkanwar GillOklahoma City$2K
- Anna StidhamOklahoma City$2K
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.