Allison Perrin, MD
Internal Medicine · Phoenix, AZNPI 1992929624
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $1,221 of the $1,855 with a category attached, or 65.8%. Merck accounts for 96.7% of it on its own, with 1 other manufacturer making up the rest.
Across 15 payments — averaging $123.65 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$2K
- Intuitive Surgical$62
Across 203 payments — averaging $4230.77 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.
- AbbVie$531K
- Novo Nordisk AS$327K
- Novartis$272
What the payments were for
- Travel & lodging$1,22166%
- Food & beverage$63434%
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 |
|---|---|---|
| Merck | 14 | $1,793 |
| Intuitive Surgical | 1 | $62 |
How this compares
$1,855 in reported general payments places this provider in the 80th percentile of 2,212 internal medicine providers in Arizona.
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 |
|---|---|---|
| JardianceEmpagliflozin | 11 | $6,455 |
| Memantine Hcl ErMemantine Hcl | 12 | $2,243 |
| Memantine Hcl | 54 | $1,644 |
| Mirtazapine | 78 | $1,616 |
| Quetiapine Fumarate | 49 | $1,575 |
| Donepezil Hcl | 89 | $1,306 |
| Rivastigmine | 11 | $1,294 |
| Carbidopa-LevodopaCarbidopa/Levodopa | 16 | $1,145 |
| Escitalopram Oxalate | 59 | $871 |
| Sertraline Hcl | 72 | $807 |
| Trazodone Hcl | 34 | $743 |
| Finasteride | 11 | $724 |
| Carbidopa-Levodopa ErCarbidopa/Levodopa | 11 | $692 |
| Galantamine ErGalantamine Hbr | 11 | $608 |
| Dicyclomine Hcl | 12 | $546 |
Paid to pharmacies, not to this prescriber.
Other internal medicine in Phoenix
- Frank LovecchioPhoenix$911K
- Nasser HajaigPhoenix$687K
- Kelly KrohnPhoenix$262K
- Paul StanderPhoenix$222K
- Howard GrossmanPhoenix$131K
- Nafis Shamsid-DeenPhoenix$115K
- Shishir MurarkaPhoenix$79K
- Mark WongPhoenix$71K
- Geoffrey OrmePhoenix$27K
- Roberto RuizPhoenix$25K
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.