David Saperstein
Neurology · Scottsdale, AZNPI 1871585711
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (60.0%), speaking fees and food and beverage — rather than concentrated in one kind of arrangement. 45 manufacturers reported payments, led by Grifols USA, LLC at 52.8% of the total. Reporting peaked in 2022 at $27,784 and has fallen 97.6% since, to $669 in 2025. Among neurology clinicians in AZ 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 507 payments — averaging $267.01 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Grifols USA, LLC$71K
- CSL Behring$12K
- Takeda Pharmaceuticals U.S.A., Inc.$10K
- UCB, Inc.$10K
- Alnylam Pharmaceuticals Inc.$9K
- Pfizer$7K
- plus $17K from 39 others
Across 9 payments — averaging $17,051 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.
- CSL Behring$153K
What the payments were for
- Consulting fees$81,20060%
- Speaking & faculty fees$35,82326%
- Travel & lodging$7,0145%
- Food & beverage$11,1668%
- Education$1100%
- Other$600%
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.
How this compares
$135,374 in reported general payments places this provider in the 90th percentile of 388 neurology providers in Arizona.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| PrivigenImmun Glob G(Igg)/Pro/Iga 0-50 | 86 | $749,737 |
| GammaplexImmun Glob G(Igg)/Gly/Iga 0-50 | 84 | $621,814 |
| Gammagard LiquidImmun Glob G(Igg)/Gly/Iga Ov50 | 14 | $371,818 |
| Gamunex-CImmune Globul G/Gly/Iga Avg 46 | 51 | $347,138 |
| GammakedImmune Globul G/Gly/Iga Avg 46 | 15 | $171,442 |
| HizentraImmun Glob G(Igg)/Pro/Iga 0-50 | 13 | $76,470 |
| Cromolyn Sodium | 25 | $19,575 |
| Droxidopa | 12 | $2,001 |
| Gabapentin | 44 | $1,709 |
| Pyridostigmine Bromide | 20 | $1,188 |
| Mycophenolate Mofetil | 16 | $1,064 |
| Promethazine Hcl | 25 | $1,064 |
| Guanfacine Hcl | 12 | $772 |
| Diphenhydramine Hcl | 55 | $757 |
| Sodium Chloride0.9 % Sodium Chloride | 70 | $708 |
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 |
|---|---|---|
| CSL BehringPrivigen, Hizentra | $11,574 | $826,20699 claims |
| Takeda Pharmaceuticals U.S.A., Inc.Gammagard Liquid | $10,162 | $371,81814 claims |
| Grifols USA, LLCGamunex-C | $71,433 | $347,13851 claims |
| Kedrion Biopharma, Inc.Gammaked | $38 | $171,44215 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 388 neurology providers in Arizona.
Other neurology in Scottsdale
- Nida LaurinScottsdale$969K
- Dean WingerchukScottsdale$324K
- Amaal StarlingScottsdale$315K
- Virgilio Gerald EvidenteScottsdale$231K
- Brent GoodmanScottsdale$198K
- Maciej MrugalaScottsdale$97K
- Charles AdlerScottsdale$74K
- Jill RauScottsdale$59K
- Shyamal MehtaScottsdale$50K
- Jonathan CarterScottsdale$44K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.