Hitham Tayoun, MD
Cytopathology · San Antonio, TXNPI 1881643492
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 24 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. Merz North America, Inc. accounts for 95.8% of it on its own, with 5 other manufacturers making up the rest. Reporting peaked in 2023 at $2,319 and has fallen 95.5% since, to $103 in 2025.
Across 24 payments — averaging $153.97 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merz North America, Inc.$4K
- Olympus America Inc.$46
- Medtronic$37
- AbbVie$29
- Axonics, Inc.$22
- Myriad Genetic Laboratories, Inc.$21
What the payments were for
- Food & beverage$3,695100%
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.
| Company | Payments | Total |
|---|---|---|
| Merz North America, Inc. | 19 | $3,541 |
| Olympus America Inc. | 1 | $46 |
| Medtronic | 1 | $37 |
| AbbVie | 1 | $29 |
| Axonics, Inc. | 1 | $22 |
| Myriad Genetic Laboratories, Inc. | 1 | $21 |
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.
- XEOMIN$2,065
How this compares
$3,695 in reported general payments places this provider in the 85th percentile of 24 cytopathology providers in Texas.
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 cytopathology in San Antonio
- Shiwen YangSan Antonio$123
- Neda KalhorHouston$30K
- Luis de Las CasasDallas$10K
- William SymmansHouston$9K
- Kidada Gilbert-LewisHouston$828
- Jorge BilbaoEl Paso$813
- Smita SuterwalaIrving$314
- Alexandra GillespieDallas$261
- Linda GreenHouston$223
- Ming GuoHouston$176
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.