John Irwin, MD
Gynecology · Houston, TXNPI 1518960566
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,896 of the $2,111 with a category attached, or 89.8%. It is spread thinly across 26 manufacturers, the largest accounting for just 17.9% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2022 at $724 and has fallen 79.2% since, to $151 in 2024.
Across 103 payments — averaging $20.50 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$377
- Astellas Pharma US Inc$334
- Bayer$209
- Myovant Sciences Inc.$166
- Sumitomo Pharma America, Inc.$129
- Agile Therapeutics, Inc.$123
- plus $774 from 20 others
What the payments were for
- Food & beverage$1,89690%
- Education$21510%
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) | 20 | $377 |
| Astellas Pharma US Inc | 9 | $334 |
| Bayer | 10 | $209 |
| Myovant Sciences Inc. | 7 | $166 |
| Sumitomo Pharma America, Inc. | 6 | $129 |
| Agile Therapeutics, Inc. | 7 | $123 |
| Coopersurgical, Inc. | 5 | $94 |
| Pfizer | 6 | $89 |
| Hologic Sales And Service, LLC | 5 | $77 |
| Medicem Inc. | 4 | $69 |
| Mayne Pharma Commercial LLC | 2 | $61 |
| Merck | 3 | $50 |
| Aspira Women's Health Inc | 2 | $43 |
| Lupin Inc. | 3 | $42 |
| Mylan Pharmaceuticals Inc. | 2 | $35 |
| Renovia Inc | 2 | $29 |
| Exact Sciences | 1 | $25 |
| Exeltis, USA Inc. | 1 | $24 |
| Medline Industries LP | 1 | $22 |
| Organon | 1 | $21 |
| Therapeuticsmd, Inc. | 1 | $17 |
| Novartis | 1 | $16 |
| Avion Pharmaceuticals | 1 | $15 |
| Millicent US Inc | 1 | $15 |
| Idorsia Pharmaceuticals US Inc | 1 | $15 |
| Amgen | 1 | $14 |
How this compares
$2,111 in reported general payments places this provider in the 70th percentile of 161 gynecology 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 |
|---|---|---|
| Estradiol | 671 | $20,726 |
| PremarinEstrogens, Conjugated | 31 | $16,201 |
| Norethindron-Ethinyl EstradiolNorethindrone Ac/Eth Estradiol | 60 | $5,273 |
| FyavolvNorethindrone Ac/Eth Estradiol | 43 | $3,540 |
| Vivelle-DotEstradiol | 11 | $2,687 |
| ProgesteroneProgesterone, Micronized | 69 | $2,574 |
| Raloxifene Hcl | 56 | $2,479 |
| YuvafemEstradiol | 17 | $2,214 |
| Estradiol (Twice Weekly)Estradiol | 21 | $2,109 |
| JinteliNorethindrone Ac/Eth Estradiol | 15 | $1,699 |
| ValacyclovirValacyclovir Hcl | 45 | $1,691 |
| Oxybutynin Chloride ErOxybutynin Chloride | 54 | $1,589 |
| SynthroidLevothyroxine Sodium | 13 | $1,362 |
| Estradiol-Norethindrone AcetatEstradiol/Norethindrone Acet | 12 | $1,258 |
| Medroxyprogesterone Acetate | 92 | $1,057 |
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 |
|---|---|---|
| PfizerPremarin | $89 | $16,20131 claims |
| AbbVieSynthroid | $377 | $1,36213 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 161 gynecology providers in Texas.
Other gynecology in Houston
- Robert ZurawinHouston$61K
- Nicolas XydasHouston$19K
- Maurice LeibmanHouston$10K
- Glenn MorganHouston$7K
- Alfred PoindexterHouston$5K
- Pinky RonenHouston$4K
- M Bruce ChristophersonHouston$3K
- Richard FarnamEl Paso$1.2M
- Jessica ShepherdDallas$809K
- Linda LacyEl Paso$627K
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.