Marcus Allen, MD
Retina Specialist · Dallas, TXNPI 1164481297
Payments from drug & device makers
Across 17 payments — averaging $20.36 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Genentech USA, Inc.$105
- AbbVie$90
- Novartis$50
- Mallinckrodt Enterprises LLC$31
- Eyepoint US, Inc.$24
- Amgen$18
- plus $29 from 2 others
What the payments were for
- Food & beverage$346100%
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 |
|---|---|---|
| Genentech USA, Inc. | 5 | $105 |
| AbbVie(2 entities) | 4 | $90 |
| Novartis | 3 | $50 |
| Mallinckrodt Enterprises LLC | 1 | $31 |
| Eyepoint US, Inc. | 1 | $24 |
| Amgen | 1 | $18 |
| Regeneron Healthcare Solutions, Inc. | 1 | $15 |
| Alimera Sciences, Inc. | 1 | $14 |
How this compares
$346 in reported general payments places this provider in the 10th percentile of 108 retina 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 |
|---|---|---|
| Ketorolac Tromethamine | 193 | $5,729 |
| Prednisolone Acetate | 108 | $4,455 |
| Brimonidine Tartrate | 16 | $3,677 |
| Brinzolamide | 17 | $3,320 |
| Diclofenac Sodium | 189 | $2,378 |
| Timolol Maleate | 135 | $1,564 |
| Flurbiprofen Sodium | 20 | $1,428 |
| Latanoprost | 123 | $1,027 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 75 | $995 |
| Tobramycin-DexamethasoneTobramycin/Dexamethasone | 11 | $615 |
| Dorzolamide Hcl | 36 | $603 |
Paid to pharmacies, not to this prescriber.
Other retina specialist in Dallas
- Judy KimDallas$256K
- Yu-Guang HeDallas$108K
- Gregory KozielecDallas$4K
- Noy AshkenazyDallas$3K
- Brian BergerAustin$7.7M
- Richard LaneSan Antonio$4.7M
- Emmanuel ChangBellaire$3.7M
- Jeremiah BrownSchertz$3M
- Victor GonzalezMcAllen$2.1M
- Courtney CrawfordBurleson$1.2M
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.