Hassan Alissa, MD
Rheumatology · San Marcos, TXNPI 1770522633
Payments from drug & device makers
Across 389 payments — averaging $1356.01 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Eli Lilly$167K
- AbbVie$146K
- GSK$118K
- Genentech, Inc.$37K
- Pfizer$28K
- Janssen Research & Development, LLC$20K
- plus $11K from 20 others
Across 2 payments — averaging $2090.14 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Eli Lilly$4K
What the payments were for
- Food & beverage$5,20898%
- Education$962%
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 |
|---|---|---|
| Eli Lilly | 5 | $167,127 |
| AbbVie | 106 | $146,248 |
| GSK | 41 | $118,118 |
| Genentech, Inc. | 15 | $36,907 |
| Pfizer | 34 | $27,660 |
| Janssen Research & Development, LLC | 14 | $20,259 |
| Amgen(2 entities) | 51 | $8,354 |
| Johnson & Johnson | 21 | $526 |
| Lilly USA, LLC | 14 | $314 |
| Boehringer Ingelheim | 12 | $294 |
| AstraZeneca | 10 | $292 |
| UCB, Inc. | 12 | $234 |
| E.r. Squibb & Sons, L.L.C. | 10 | $199 |
| Genentech USA, Inc. | 10 | $190 |
| Novartis | 8 | $169 |
| Mallinckrodt Hospital Products Inc. | 5 | $138 |
| Aurinia Pharma U.S., Inc. | 5 | $126 |
| Mallinckrodt Enterprises LLC | 2 | $62 |
| Radius Health, Inc. | 3 | $53 |
| Bristol Myers Squibb | 2 | $42 |
| Sanofi | 2 | $37 |
| Teva Pharmaceuticals USA, Inc. | 2 | $37 |
| Hikma Pharmaceuticals USA | 2 | $34 |
| Almatica Pharma LLC | 1 | $25 |
| Pacira Therapeutics, Inc. | 1 | $21 |
| Abbott | 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.
- Rinvoq$117
How this compares
$527,486 in reported general payments places this provider in the 90th percentile of 512 rheumatology 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 |
|---|---|---|
| Enbrel SureclickEtanercept | 62 | $474,732 |
| RinvoqUpadacitinib | 45 | $343,493 |
| Humira(Cf) PenAdalimumab | 28 | $195,355 |
| Orencia ClickjectAbatacept | 31 | $181,738 |
| Xeljanz XrTofacitinib Citrate | 27 | $168,581 |
| EnbrelEtanercept | 15 | $131,892 |
| OrenciaAbatacept | 20 | $124,377 |
| SimponiGolimumab | 13 | $79,374 |
| Cimzia (2 Pack)Certolizumab Pegol | 11 | $67,717 |
| ForteoTeriparatide | 12 | $56,465 |
| Hydroxychloroquine Sulfate | 381 | $8,733 |
| Leflunomide | 105 | $3,315 |
| Mycophenolate Mofetil | 30 | $2,905 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 90 | $2,620 |
| Prednisone | 320 | $1,868 |
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 |
|---|---|---|
| AbbVieRinvoq | $146,248 | $343,49345 claims |
| AmgenEnbrel | $8,354 | $131,89215 claims |
| E.r. Squibb & Sons, L.L.C.Orencia | $199 | $124,37720 claims |
| Johnson & JohnsonSimponi | $526 | $79,37413 claims |
| UCB, Inc.Cimzia (2 Pack) | $234 | $67,71711 claims |
| Lilly USA, LLCForteo | $314 | $56,46512 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 90th percentile of 512 rheumatology providers in Texas.
Other rheumatology in San Marcos
- Paul PickrellAustin$40.9M
- Atul SinghalMesquite$13.9M
- Shaikh AliTomball$9.8M
- Jitendra VasandaniLubbock$6.4M
- Dhiman BasuColleyville$6.2M
- Tamar BrionezThe Woodlands$5.2M
- Philip WallerHouston$4.9M
- John CushDallas$3.9M
- Sabeen NajamBaytown$3.6M
- Sanjay ChabraEl Paso$3.6M
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.