Sierra Singleton, NP
Nurse Practitioner · Charlotte, NCNPI 1891200572
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (42.6%), speaking fees and travel and lodging — rather than concentrated in one kind of arrangement. Astellas Pharma US Inc accounts for 95.4% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2023 at $7,064 and has fallen 98.5% since, to $104 in 2025. Among nurse practitioner clinicians in NC with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 16 payments — averaging $448.74 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Astellas Pharma US Inc$7K
- BD$151
- Merck$53
- Astellas Pharma Global Development$48
- AbbVie$34
- GSK$17
- plus $26 from 2 others
What the payments were for
- Consulting fees$3,05943%
- Speaking & faculty fees$2,30032%
- Travel & lodging$1,03714%
- Food & beverage$78311%
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 |
|---|---|---|
| Astellas Pharma US Inc | 8 | $6,851 |
| BD | 1 | $151 |
| Merck | 2 | $53 |
| Astellas Pharma Global Development | 1 | $48 |
| AbbVie | 1 | $34 |
| GSK | 1 | $17 |
| Bayer | 1 | $14 |
| Organon | 1 | $11 |
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.
- Veozah$2,300
- BD ONCLARITY$151
How this compares
$7,180 in reported general payments places this provider in the 95th percentile of 4,393 nurse practitioner 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.
Other nurse practitioner in Charlotte
- Mary DilorenzoCharlotte$71K
- Dennis TaylorCharlotte$39K
- Geovanna DeeseCharlotte$26K
- Melissa TharpeCharlotte$24K
- Marie MooreCharlotte$21K
- Natasha LaunganiCharlotte$18K
- Vicki MortonCharlotte$18K
- Courtney CarrCharlotte$18K
- Travis ShipeCharlotte$17K
- Kelly XiongCharlotte$16K
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.