Mark Weissig, MD
Pulmonary Disease · Fullerton, CANPI 1649266032
Payments from drug & device makers
Across 219 payments — averaging $22.23 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GSK$2K
- Boehringer Ingelheim$1K
- AstraZeneca$1K
- Genentech USA, Inc.$219
- Insmed, Inc.$204
- E.r. Squibb & Sons, L.L.C.$67
- plus $255 from 7 others
What the payments were for
- Consulting fees$200%
- Food & beverage$4,58394%
- Education$2665%
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 |
|---|---|---|
| GSK | 76 | $1,819 |
| Boehringer Ingelheim | 63 | $1,238 |
| AstraZeneca | 40 | $1,069 |
| Genentech USA, Inc. | 19 | $219 |
| Insmed, Inc. | 3 | $204 |
| E.r. Squibb & Sons, L.L.C. | 4 | $67 |
| Philips North America LLC | 2 | $58 |
| Amgen | 3 | $49 |
| CSL Behring | 3 | $41 |
| Grifols USA, LLC | 3 | $35 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $33 |
| Sanofi Pasteur Inc. | 1 | $20 |
| United Therapeutics Corporation | 1 | $19 |
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.
How this compares
$4,869 in reported general payments places this provider in the 65th percentile of 1,261 pulmonary disease providers in California.
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 |
|---|---|---|
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 439 | $403,860 |
| Prolastin CAlpha-1-Proteinase Inhibitor | 20 | $235,910 |
| Breztri AerosphereBudesonide/Glycopyr/Formoterol | 268 | $225,366 |
| OfevNintedanib Esylate | 14 | $128,821 |
| Breo ElliptaFluticasone/Vilanterol | 176 | $114,103 |
| Spiriva RespimatTiotropium Bromide | 101 | $93,282 |
| Anoro ElliptaUmeclidinium Brm/Vilanterol Tr | 82 | $68,801 |
| Stiolto RespimatTiotropium Br/Olodaterol Hcl | 91 | $64,077 |
| OctagamImmun Globg(Igg)/Malt/Iga Ov50 | 12 | $53,845 |
| Serevent DiskusSalmeterol Xinafoate | 79 | $52,390 |
| EliquisApixaban | 57 | $41,513 |
| SymbicortBudesonide/Formoterol Fumarate | 70 | $23,640 |
| Wixela InhubFluticasone Propion/Salmeterol | 113 | $18,690 |
| BreynaBudesonide/Formoterol Fumarate | 58 | $16,392 |
| Incruse ElliptaUmeclidinium Bromide | 19 | $13,547 |
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 |
|---|---|---|
| GSKTrelegy Ellipta, Breo Ellipta, Anoro Ellipta, Incruse Ellipta, Arnuity Ellipta | $1,819 | $607,951729 claims |
| Boehringer IngelheimOfev, Spiriva Respimat, Stiolto Respimat | $1,238 | $286,180206 claims |
| AstraZenecaBreztri Aerosphere, Symbicort, Bevespi Aerosphere | $1,069 | $261,898359 claims |
| Grifols USA, LLCProlastin C | $35 | $235,91020 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 65th percentile of 1,261 pulmonary disease providers in California.
Other pulmonary disease in Fullerton
- Toby MaherLos Angeles$27.6M
- David PhamWestminster$5.9M
- Andrew WachtelLos Angeles$5.9M
- Aaron WeinbergIrvine$5.1M
- Michael RothLos Angeles$4.5M
- Namita SoodSacramento$3.7M
- Edward FedermanSan Diego$3.6M
- Sanjay VadgamaSherman Oaks$3.3M
- Rajan SaggarLos Angeles$3.3M
- Samuel LouieSacramento$2.8M
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.