Andrew Davidson, MD
Allergy & Immunology · Charleston, SCNPI 1134121718
Payments from drug & device makers
Across 594 payments — averaging $105.39 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GSK$50K
- AstraZeneca$3K
- Sanofi$2K
- Takeda Pharmaceuticals U.S.A., Inc.$819
- CSL Behring$801
- Genentech USA, Inc.$698
- plus $5K from 34 others
What the payments were for
- Consulting fees$230%
- Food & beverage$13,18597%
- Education$3643%
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 | 70 | $50,220 |
| AstraZeneca | 138 | $3,006 |
| Sanofi | 63 | $1,657 |
| Takeda Pharmaceuticals U.S.A., Inc. | 36 | $819 |
| CSL Behring | 30 | $801 |
| Genentech USA, Inc. | 25 | $698 |
| Pfizer | 31 | $575 |
| Amgen | 19 | $524 |
| Pharming Healthcare, Inc. | 17 | $522 |
| Biocryst US Sales Co., LLC | 18 | $483 |
| Regeneron Healthcare Solutions, Inc. | 17 | $452 |
| Alk-abello, Inc | 17 | $378 |
| Novartis | 13 | $348 |
| Sanofi-aventis U.S. LLC | 4 | $278 |
| Teva Pharmaceuticals USA, Inc. | 16 | $239 |
| Optinose US, Inc. | 10 | $204 |
| Grifols USA, LLC | 8 | $166 |
| ARS Pharmaceuticals Operations, Inc. | 4 | $159 |
| Kaleo, Inc. | 9 | $143 |
| Hikma Pharmaceuticals USA | 8 | $131 |
| Sunovion Pharmaceuticals Inc. | 6 | $98 |
| Hospira, Inc. | 3 | $72 |
| Cycle Pharmaceuticals Inc | 3 | $60 |
| Organon | 3 | $59 |
| Insmed, Inc. | 2 | $52 |
| USWM, LLC | 2 | $50 |
| Ionis Pharmaceuticals, Inc. | 2 | $45 |
| Mylan Specialty L.p. | 3 | $41 |
| Blueprint Medicines Corporation | 2 | $39 |
| Merck | 2 | $36 |
| Aimmune Therapeutics, Inc. | 2 | $36 |
| Incyte Corporation | 2 | $33 |
| Boehringer Ingelheim | 1 | $28 |
| Bio Products Laboratory USA, Inc. | 1 | $26 |
| GC Biopharma USA, Inc. | 1 | $25 |
| Eyevance Pharmaceuticals LLC | 2 | $25 |
| ADMA Biomanufacturing LLC | 1 | $23 |
| LEO Pharma Inc. | 1 | $20 |
| Octapharma USA, Inc. | 1 | $15 |
| Viatris Specialty LLC | 1 | $14 |
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
$62,600 in reported general payments places this provider in the 80th percentile of 46 allergy & immunology providers in South Carolina.
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 |
|---|---|---|
| XolairOmalizumab | 17 | $47,615 |
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 51 | $43,601 |
| Breo ElliptaFluticasone/Vilanterol | 52 | $35,221 |
| Spiriva RespimatTiotropium Bromide | 16 | $9,564 |
| Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate | 34 | $9,226 |
| Advair HfaFluticasone Propion/Salmeterol | 20 | $8,421 |
| SymbicortBudesonide/Formoterol Fumarate | 21 | $6,452 |
| Epinephrine | 41 | $6,134 |
| Arnuity ElliptaFluticasone Furoate | 15 | $5,445 |
| Fluticasone-SalmeterolFluticasone Propion/Salmeterol | 33 | $3,992 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 130 | $3,795 |
| Wixela InhubFluticasone Propion/Salmeterol | 38 | $3,267 |
| Ipratropium Bromide | 59 | $2,418 |
| Azelastine Hcl | 72 | $2,390 |
| Fluticasone Propionate | 102 | $2,337 |
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, Arnuity Ellipta | $50,220 | $84,266118 claims |
| Boehringer IngelheimSpiriva Respimat | $28 | $9,56416 claims |
| AstraZenecaSymbicort | $3,006 | $6,45221 claims |
| Hikma Pharmaceuticals USAEpinephrine | $131 | $6,13441 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 80th percentile of 46 allergy & immunology providers in South Carolina.
Other allergy & immunology in Charleston
- Thomas MurphyCharleston$1.4M
- Carolyn WordCharleston$10K
- Jeffrey DietrichCharleston$8K
- Lindsey SteadmanCharleston$6K
- Brian DantzlerCharleston$2K
- Thomas HarperCharleston$1K
- John RameyNorth Charleston$1.5M
- Douglas JohnstonGreenville$1.3M
- Patricia GerberNorth Charleston$970K
- Ned RuppNorth Charleston$861K
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.