William Grainger
Neurology · Gilbert, AZNPI 1003963679
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $148,794 of the $211,399 with a category attached, or 70.4%. Biogen accounts for 73.3% of it on its own, with 52 other manufacturers making up the rest. Reporting peaked in 2019 at $81,218 and has fallen 83.9% since, to $13,101 in 2023. 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 810 payments — averaging $260.99 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Biogen$155K
- Genentech USA, Inc.$18K
- Amgen$16K
- Teva Pharmaceuticals USA, Inc.$14K
- Bristol Myers Squibb$2K
- AbbVie$1K
- plus $6K from 47 others
Across 19 payments — averaging $6682.73 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.
- Biogen$120K
- Teva Pharmaceuticals USA, Inc.$7K
What the payments were for
- Consulting fees$24,92112%
- Speaking & faculty fees$148,79470%
- Travel & lodging$20,88110%
- Food & beverage$16,7138%
- Education$890%
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
$211,399 in reported general payments places this provider in the 90th percentile of 388 neurology providers in Arizona.
Other neurology in Gilbert
- Jonathan HodgsonGilbert$408K
- Paarth ShahGilbert$283K
- Kan YuGilbert$35K
- Barry HendinPhoenix$2.3M
- Maria OspinaPhoenix$2.1M
- Suraj MuleyPhoenix$1.7M
- Nida LaurinScottsdale$969K
- Eric ErossPhoenix$778K
- Steve ChungPhoenix$685K
- Marwan SabbaghPhoenix$603K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.