Mark Knipfer, MD
Family Medicine · Spartanburg, SCNPI 1982650172
Payments from drug & device makers
Across 815 payments — averaging $18.59 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$3K
- AbbVie$2K
- Novo Nordisk$872
- Amgen$798
- Novartis$718
- Pfizer$559
- plus $7K from 53 others
What the payments were for
- Food & beverage$14,94399%
- Education$1201%
- Other$841%
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.
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.
- FARXIGA$1,118
- BREZTRI$786
- AIRSUPRA$377
- BEVESPI AEROSPHERE$271
- FASENRA$251
- UBRELVY$249
- Tresiba$243
- Ozempic$234
- VRAYLAR$225
- SYMBICORT$136
- ENTRESTO$125
- Prolia$122
- AirDuo RespiClick$103
- ArmonAir Digihaler$103
- ProAir Digihaler$103
How this compares
$15,147 in reported general payments places this provider in the 95th percentile of 2,153 family medicine 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 |
|---|---|---|
| KorlymMifepristone | 13 | $561,323 |
| OzempicSemaglutide | 263 | $319,200 |
| FarxigaDapagliflozin Propanediol | 201 | $197,175 |
| EliquisApixaban | 138 | $122,867 |
| Metformin Er GastricMetformin Hcl | 13 | $119,200 |
| JardianceEmpagliflozin | 98 | $114,128 |
| Repatha SureclickEvolocumab | 90 | $96,083 |
| TrulicityDulaglutide | 51 | $67,672 |
| Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog | 35 | $66,225 |
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 48 | $58,023 |
| MounjaroTirzepatide | 46 | $53,569 |
| Tresiba Flextouch U-200Insulin Degludec | 24 | $52,999 |
| RybelsusSemaglutide | 37 | $49,125 |
| XareltoRivaroxaban | 42 | $48,722 |
| Breztri AerosphereBudesonide/Glycopyr/Formoterol | 34 | $41,660 |
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 |
|---|---|---|
| Corcept TherapeuticsKorlym | $118 | $561,32313 claims |
| Novo NordiskOzempic, Rybelsus | $872 | $368,326300 claims |
| AstraZenecaFarxiga, Breztri Aerosphere | $3,089 | $238,834235 claims |
| Boehringer IngelheimJardiance, Glyxambi | $100 | $127,091114 claims |
| GSKTrelegy Ellipta, Arexvy, Breo Ellipta, Shingrix | $438 | $123,563260 claims |
| PfizerEliquis | $559 | $122,867138 claims |
| Lilly USA, LLCTrulicity, Mounjaro | $469 | $121,24197 claims |
| Johnson & JohnsonXarelto | $395 | $48,72242 claims |
| AbbVieUbrelvy, Linzess | $2,232 | $33,88027 claims |
| BayerKerendia | $308 | $28,33733 claims |
| Astellas Pharma US IncMyrbetriq | $395 | $25,27328 claims |
| Sanofi-aventis U.S. LLCSoliqua 100-33 | $399 | $23,12620 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 95th percentile of 2,153 family medicine providers in South Carolina.
Other family medicine in Spartanburg
- Latasha SelibySpartanburg$24K
- George BailesSpartanburg$22K
- Cayce TangemanGoose Creek$8.4M
- Jeremy AckermannMoncks Corner$7.6M
- Kelly MoralesNorth Charleston$6.5M
- William ByarsGreer$4.8M
- James FranklinGreenville$3.5M
- Stephen GrubbLittle River$3.4M
- Jeffrey HarrisGreenville$3.4M
- Shannon ConradN Charleston$3.3M
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.