Adam Schertz, MD
Pulmonary Disease · Greenville, SCNPI 1952798985
Payments from drug & device makers
What this record shows
AstraZeneca accounts for 77.4% of it on its own, with 14 other manufacturers making up the rest. Reporting peaked in 2024 at $1,797 and has fallen 65.9% since, to $613 in 2025. That places this record below the midpoint for pulmonary disease clinicians in SC, where the typical reported total is $2,769.
Across 53 payments — averaging $47.73 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$2K
- GSK$170
- United Therapeutics Corporation$51
- Merck$47
- Insmed, Inc.$46
- Amgen$46
- plus $211 from 9 others
Across 2 payments — averaging $25,507 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.
- AstraZeneca$51K
What the payments were for
- Travel & lodging$1,09243%
- Food & beverage$1,43857%
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 |
|---|---|---|
| AstraZeneca | 27 | $1,957 |
| GSK | 8 | $170 |
| United Therapeutics Corporation | 2 | $51 |
| Merck | 2 | $47 |
| Insmed, Inc. | 2 | $46 |
| Amgen | 2 | $46 |
| Mylan Specialty L.p. | 1 | $39 |
| Baxter Healthcare | 1 | $28 |
| Astellas Pharma US Inc | 1 | $26 |
| Regeneron Healthcare Solutions, Inc. | 1 | $25 |
| Boehringer Ingelheim | 1 | $22 |
| Electromed, Inc. | 2 | $21 |
| Avadel CNS Pharmaceuticals, LLC | 1 | $17 |
| Lilly USA, LLC | 1 | $16 |
| Viatris Specialty LLC | 1 | $16 |
How this compares
$2,530 in reported general payments places this provider in the 45th percentile of 192 pulmonary disease 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 |
|---|---|---|
| Dupixent PenDupilumab | 51 | $203,283 |
| TezspireTezepelumab-Ekko | 23 | $95,539 |
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 136 | $93,129 |
| Breztri AerosphereBudesonide/Glycopyr/Formoterol | 26 | $20,851 |
| Anoro ElliptaUmeclidinium Brm/Vilanterol Tr | 24 | $12,655 |
| EliquisApixaban | 13 | $10,030 |
| Stiolto RespimatTiotropium Br/Olodaterol Hcl | 19 | $9,887 |
| Atrovent HfaIpratropium Bromide | 12 | $5,876 |
| SymbicortBudesonide/Formoterol Fumarate | 16 | $5,156 |
| AirsupraAlbuterol Sulfate/Budesonide | 11 | $5,131 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 111 | $2,884 |
| Wixela InhubFluticasone Propion/Salmeterol | 28 | $2,530 |
| Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate | 15 | $2,045 |
| Fluticasone-SalmeterolFluticasone Propion/Salmeterol | 19 | $1,216 |
| Ipratropium Bromide | 19 | $1,025 |
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 |
|---|---|---|
| AstraZenecaTezspire, Breztri Aerosphere, Symbicort, Airsupra | $1,957 | $126,67776 claims |
| GSKTrelegy Ellipta, Anoro Ellipta | $170 | $105,784160 claims |
| Boehringer IngelheimStiolto Respimat | $22 | $9,88719 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 45th percentile of 192 pulmonary disease providers in South Carolina.
Other pulmonary disease in Greenville
- Sean CallahanGreenville$321K
- Daniel Lo VerdeGreenville$14K
- Michael KasterGreenville$13K
- Ezzat El BayoumiGreenville$8K
- Azim SurkaGreenville$8K
- Abhijit RavalAnderson$2M
- Richard BoganColumbia$1.1M
- Joseph BosciaSpartanburg$701K
- Patrick FlumeCharleston$418K
- Laura HerpelColumbia$254K
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.