Gabriel Diaz, MD
Hospitalist · Maywood, ILNPI 1467946335
Payments from drug & device makers
What this record shows
This record is dominated by grants: $17,500 of the $18,032 with a category attached, or 97.1%. Abbott accounts for 97.2% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2022 at $17,634 and has fallen 99.2% since, to $139 in 2023. Among hospitalist clinicians in IL 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 9 payments — averaging $2003.54 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Abbott$18K
- Abiomed$139
- AstraZeneca$120
- Journey Medical Corporation$114
- Merz North America, Inc.$100
- ZOLL Services LLC (a/k/a ZOLL Lifecor Corp)$16
- plus $24 from 2 others
What the payments were for
- Grants$17,50097%
- Food & beverage$5323%
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 |
|---|---|---|
| Abbott | 2 | $17,520 |
| Abiomed | 1 | $139 |
| AstraZeneca | 1 | $120 |
| Journey Medical Corporation | 1 | $114 |
| Merz North America, Inc. | 1 | $100 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 1 | $16 |
| BD | 1 | $13 |
| Merck | 1 | $11 |
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
$18,032 in reported general payments places this provider in the 95th percentile of 1,328 hospitalist providers in Illinois.
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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Metoprolol Succinate | 11 | $47 |
Paid to pharmacies, not to this prescriber.
Other hospitalist in Maywood
- Wajahat HumayunMaywood$20K
- Tiffany WhiteMaywood$2K
- Sean GreenhalghMaywood$2K
- Odulola OdusanyaLibertyville$544K
- Salih SamoChicago$251K
- Eric GluckChicago$80K
- Jorge Gomez AlarconLake Forest$72K
- Alvin ThomasChicago$28K
- Osman QaiyumMount Vernon$22K
- Tasmeen HussainChicago$18K
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.