Mariana Middelhof, MD
Pediatric Gastroenterology · Fairfax, VANPI 1710293337
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 66 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 16 manufacturers reported payments, led by QOL Medical, LLC at 33.0% of the total. Reporting peaked in 2024 at $534 and has fallen 67.2% since, to $175 in 2025.
Across 66 payments — averaging $21.01 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- QOL Medical, LLC$457
- AbbVie$176
- Johnson & Johnson$146
- Regeneron Healthcare Solutions, Inc.$115
- Ipsen Biopharmaceuticals, Inc$95
- Phadia US Inc.$75
- plus $323 from 10 others
What the payments were for
- Food & beverage$1,387100%
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.
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.
How this compares
$1,387 in reported general payments places this provider in the 75th percentile of 43 pediatric gastroenterology providers in Virginia.
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 pediatric gastroenterology in Fairfax
- Otto Louis-JacquesFairfax$644
- Catherine ChaoFairfax$493
- Stefany GarrityFairfax$373
- Peter LeeFairfax$337
- Grace FelixFairfax$172
- Benjamin EnavFairfax$25
- Natalie SikkaFairfax$16
- Iris Jo-ShiFairfax$15
- Barrett BarnesCharlottesville$30K
- Frank DipaolaCharlottesville$16K
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.