David Sappenfield, MD
Retina Specialist · Durham, NCNPI 1639161862
Payments from drug & device makers
What this record shows
That places this record below the midpoint for retina specialist clinicians in NC, where the typical reported total is $3,753.
Across 2 payments — averaging $18.09 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Carl Zeiss Meditec AG$19
- Novartis$17
What the payments were for
- Food & beverage$1746%
- Gifts$1954%
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 |
|---|---|---|
| Carl Zeiss Meditec AG | 1 | $19 |
| Novartis | 1 | $17 |
How this compares
$36 in reported general payments places this provider in the 0th percentile of 34 retina specialist providers in North 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 |
|---|---|---|
| RestasisCyclosporine | 30 | $38,949 |
| Brimonidine Tartrate | 78 | $6,210 |
| Brimonidine Tartrate-TimololBrimonidine Tartrate/Timolol | 34 | $5,420 |
| Prednisolone Acetate | 130 | $5,300 |
| LumiganBimatoprost | 15 | $5,035 |
| RhopressaNetarsudil Mesylate | 14 | $4,410 |
| Latanoprost | 318 | $2,978 |
| Dorzolamide-TimololDorzolamide/Timolol/Pf | 26 | $2,616 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 75 | $851 |
| Atropine Sulfate | 19 | $652 |
| Ketorolac Tromethamine | 17 | $385 |
| Timolol Maleate | 38 | $238 |
| Dorzolamide Hcl | 17 | $87 |
Paid to pharmacies, not to this prescriber.
Other retina specialist in Durham
- Eleonora LadDurham$331K
- Michael AllinghamDurham$63K
- Oleg AlekseevDurham$4K
- Liangbo ShenDurham$4K
- Jeremy ShawDurham$993
- Michael FliotsosDurham$982
- Daniel BennettRaleigh$126K
- Raynor CaseyRaleigh$34K
- Sachin MudvariRaleigh$33K
- John ThordsenRaleigh$33K
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.