David D Alessio, MD
Endocrinology, Diabetes & Metabolism · Durham, NCNPI 1871558817
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $161,309 of the $211,884 with a category attached, or 76.1%. Eli Lilly accounts for 88.2% of it on its own, with 3 other manufacturers making up the rest. 2025 is the largest year on record at $86,139, 6.2 times the $13,956 reported in 2019. Among endocrinology, diabetes & metabolism clinicians in NC with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 148 payments — averaging $1431.65 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Eli Lilly$187K
- Lilly USA, LLC$13K
- Novo Nordisk$7K
- Vertex$5K
Across 4 payments — averaging $40,316 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.
- Merck$104K
- Eli Lilly$57K
What the payments were for
- Consulting fees$161,30976%
- Speaking & faculty fees$4,4002%
- Travel & lodging$43,26520%
- Food & beverage$1,5151%
- Education$1,3951%
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 |
|---|---|---|
| Eli Lilly | 136 | $186,823 |
| Lilly USA, LLC | 3 | $12,813 |
| Novo Nordisk | 5 | $7,498 |
| Vertex | 4 | $4,750 |
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
$211,884 in reported general payments places this provider in the 90th percentile of 232 endocrinology, diabetes & metabolism providers in North Carolina.
See all endocrinology, diabetes & metabolism 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 |
|---|---|---|
| OzempicSemaglutide | 35 | $37,672 |
| SynthroidLevothyroxine Sodium | 33 | $2,421 |
| Levothyroxine Sodium | 158 | $2,089 |
| Humulin 70/30 KwikpenInsulin Nph Hum/Reg Insulin Hm | 14 | $1,883 |
| Hydrocortisone | 32 | $1,304 |
| Calcitriol | 11 | $627 |
| Testosterone Cypionate | 24 | $429 |
| Methimazole | 24 | $216 |
| Metformin Hcl ErMetformin Hcl | 11 | $214 |
| Prednisone | 21 | $214 |
| Metformin Hcl | 13 | $153 |
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 |
|---|---|---|
| Novo NordiskOzempic | $7,498 | $37,67235 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 90th percentile of 232 endocrinology, diabetes & metabolism providers in North Carolina.
Other endocrinology, diabetes & metabolism in Durham
- Jennifer GreenDurham$439K
- Todd FriezeDurham$421K
- Thomas WeberDurham$16K
- Leena ShahlaDurham$14K
- Mark WarrenGreenville$915K
- Thomas OconnellBurlington$805K
- Corey BerlinRaleigh$742K
- Michael FavoritoWilmington$723K
- Stephen SouthGreensboro$624K
- Richard DoddAsheville$526K
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.