Anthony Chahin, MD
Pulmonary Disease · Bel Air, MDNPI 1891236147
Payments from drug & device makers
Across 80 payments — averaging $22.40 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GSK$316
- AstraZeneca$273
- Grifols USA, LLC$217
- Regeneron Healthcare Solutions, Inc.$186
- Amgen$121
- Insmed, Inc.$87
- plus $593 from 16 others
What the payments were for
- Food & beverage$1,792100%
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 | 15 | $316 |
| AstraZeneca | 15 | $273 |
| Grifols USA, LLC | 9 | $217 |
| Regeneron Healthcare Solutions, Inc. | 7 | $186 |
| Amgen | 6 | $121 |
| Insmed, Inc. | 4 | $87 |
| Harmony Biosciences LLC | 2 | $76 |
| Baxter Healthcare | 3 | $65 |
| Axsome Therapeutics, Inc. | 2 | $53 |
| Electromed, Inc. | 3 | $53 |
| Viatris Specialty LLC | 2 | $50 |
| Vifor Pharma, Inc. | 2 | $43 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $39 |
| Mallinckrodt Hospital Products Inc. | 1 | $39 |
| Mylan Specialty L.p. | 1 | $31 |
| Jazz Pharmaceuticals Inc. | 1 | $26 |
| United Therapeutics Corporation | 1 | $25 |
| Boehringer Ingelheim | 1 | $21 |
| Inspire Medical Systems, Inc. | 1 | $21 |
| Lilly USA, LLC | 1 | $19 |
| Merck | 1 | $17 |
| AbbVie | 1 | $15 |
How this compares
$1,792 in reported general payments places this provider in the 50th percentile of 297 pulmonary disease providers in Maryland.
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 | 49 | $32,461 |
| Breo ElliptaFluticasone/Vilanterol | 50 | $25,509 |
| Advair HfaFluticasone Propion/Salmeterol | 31 | $15,589 |
| Breztri AerosphereBudesonide/Glycopyr/Formoterol | 16 | $12,286 |
| Anoro ElliptaUmeclidinium Brm/Vilanterol Tr | 20 | $9,745 |
| Spiriva RespimatTiotropium Bromide | 12 | $7,060 |
| Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate | 27 | $5,374 |
| Incruse ElliptaUmeclidinium Bromide | 13 | $4,330 |
| SymbicortBudesonide/Formoterol Fumarate | 15 | $3,608 |
| Fluticasone-VilanterolFluticasone/Vilanterol | 14 | $3,199 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 55 | $1,601 |
| Ventolin HfaAlbuterol Sulfate | 16 | $896 |
| Fluticasone Propionate | 27 | $501 |
| Pantoprazole Sodium | 13 | $156 |
| Azelastine Hcl | 11 | $107 |
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 | $316 | $72,044132 claims |
| AstraZenecaBreztri Aerosphere, Symbicort | $273 | $15,89431 claims |
| Boehringer IngelheimSpiriva Respimat | $21 | $7,06012 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 50th percentile of 297 pulmonary disease providers in Maryland.
Other pulmonary disease in Bel Air
- Richard BernsteinAnnapolis$5.7M
- Alan SchwartzBaltimore$1.6M
- Sonye DanoffBaltimore$1.5M
- Michael DrummondBaltimore$1.4M
- da Wei LiaoBethesda$1.3M
- Paul HassounBaltimore$1.3M
- Lonny YarmusBaltimore$1.2M
- Jonathan SevranskyBaltimore$971K
- Robert ChasseSalisbury$788K
- Robert WiseBaltimore$761K
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.