Keith Unger, MD
Radiation Oncology · Washington, DCNPI 1205077781
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $4,500 of the $5,407 with a category attached, or 83.2%. Mevion_medical_systems_inc accounts for 83.2% of it on its own, with 3 other manufacturers making up the rest. Reporting peaked in 2021 at $3,000 and has fallen 71.7% since, to $848 in 2025.
Across 6 payments — averaging $901.13 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Mevion_medical_systems_inc$5K
- Reflexion Medical, Inc.$848
- Zap Surgical Systems, Inc.$40
- Siemens Medical Solutions USA, Inc.$19
Across 2 payments — averaging $17,750 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.
- Mevion_medical_systems_inc$36K
What the payments were for
- Speaking & faculty fees$4,50083%
- Travel & lodging$84816%
- Food & beverage$591%
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 |
|---|---|---|
| Mevion_medical_systems_inc | 3 | $4,500 |
| Reflexion Medical, Inc. | 1 | $848 |
| Zap Surgical Systems, Inc. | 1 | $40 |
| Siemens Medical Solutions USA, Inc. | 1 | $19 |
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
$5,407 in reported general payments places this provider in the 80th percentile of 25 radiation oncology providers in District of Columbia.
See all radiation oncology providers in District of Columbia →
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 radiation oncology in Washington
- Sean CollinsWashington$395K
- Jonathan LischalkWashington$55K
- Christina TsienWashington$53K
- Brian CollinsWashington$27K
- Rajanish SinglaWashington$5K
- Rachit KumarWashington$4K
- Martin Ojong-NtuiWashington$2K
- Jill RemickWashington$2K
- Matthew ForsthoefelWashington$2K
- Pamela Randolph JacksonWashington$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.