Thao Thach, MD
Glaucoma Specialist · Garland, TXNPI 1063403061
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 92.0% of the total across 185 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 23 manufacturers reported payments, led by AbbVie at 24.5% of the total.
Across 185 payments — averaging $22.82 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$1K
- Sun Pharmaceutical Industries Inc.$734
- Johnson & Johnson Surgical Vision, Inc.$488
- Alcon$364
- Aerie Pharmaceuticals, Inc.$357
- Novartis$269
- plus $976 from 17 others
What the payments were for
- Speaking & faculty fees$2596%
- Food & beverage$3,88692%
- Education$401%
- Gifts$371%
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 |
|---|---|---|
| AbbVie(2 entities) | 55 | $1,036 |
| Sun Pharmaceutical Industries Inc. | 50 | $734 |
| Johnson & Johnson Surgical Vision, Inc. | 10 | $488 |
| Alcon | 12 | $364 |
| Aerie Pharmaceuticals, Inc. | 6 | $357 |
| Novartis | 14 | $269 |
| Notal Vision, Inc. | 1 | $259 |
| Biotissue Holdings Inc. | 5 | $131 |
| Bausch & Lomb Americas Inc. | 6 | $101 |
| Tarsus Pharmaceuticals, Inc. | 3 | $74 |
| Rxsight Inc | 3 | $70 |
| Harrow Eye, LLC | 3 | $48 |
| Coopervision Inc. | 2 | $42 |
| Oyster Point Pharma, Inc. | 2 | $38 |
| Bausch & Lomb, A Division Of Bausch Health US, LLC | 2 | $36 |
| Amgen | 2 | $35 |
| Glaukos Corporation | 1 | $34 |
| NEW World Medical,inc. | 3 | $26 |
| Dompe US, Inc. | 1 | $23 |
| Carl Zeiss Meditec AG | 1 | $19 |
| Carl Zeiss Meditec, Inc. | 1 | $17 |
| Eyevance Pharmaceuticals LLC | 1 | $12 |
| Ocular Therapeutix, Inc. | 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.
- Rhopressa$282
- Rocklatan$282
- Tecnis IOL$153
- Clareon$137
- CEQUA$116
- Tecnis Symfony IOL$105
- Tecnis Symfony Toric IOL$105
- Tecnis Multifocal Family of 1-piece IOLS$105
- Catalys Laser System$103
How this compares
$4,222 in reported general payments places this provider in the 70th percentile of 31 glaucoma specialist 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| LumiganBimatoprost | 258 | $176,877 |
| RestasisCyclosporine | 89 | $132,669 |
| CequaCyclosporine | 91 | $126,668 |
| XiidraLifitegrast | 62 | $103,715 |
| CombiganBrimonidine Tartrate/Timolol | 125 | $76,663 |
| RhopressaNetarsudil Mesylate | 161 | $57,299 |
| Ketorolac Tromethamine | 507 | $25,266 |
| Cyclosporine | 39 | $24,887 |
| Prednisolone Acetate | 334 | $24,203 |
| Brimonidine Tartrate-TimololBrimonidine Tartrate/Timolol | 73 | $15,438 |
| Alphagan PBrimonidine Tartrate | 28 | $11,991 |
| TyrvayaVarenicline Tartrate | 13 | $8,812 |
| Brinzolamide | 25 | $4,319 |
| Latanoprost | 369 | $3,661 |
| Ofloxacin | 269 | $3,225 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| AbbVieLumigan, Restasis, Combigan, Alphagan P | $1,036 | $398,200500 claims |
| Sun Pharmaceutical Industries Inc.Cequa | $734 | $126,66891 claims |
| Bausch & Lomb Americas Inc.Xiidra | $101 | $103,71562 claims |
| Aerie Pharmaceuticals, Inc.Rhopressa | $357 | $57,299161 claims |
| Oyster Point Pharma, Inc.Tyrvaya | $38 | $8,81213 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 70th percentile of 31 glaucoma specialist providers in Texas.
Other glaucoma specialist in Garland
- Shivani KamatDallas$164K
- Robert FeldmanHouston$31K
- Amenze OriaifoAustin$18K
- David LeeHouston$17K
- Nicholas GurneyFt Worth$13K
- Patrick WuHouston$11K
- Irina VoloskoAustin$11K
- Logan VincentTyler$5K
- Elza RachidHouston$4K
- Adam VandenlangenbergHouston$3K
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.