Margaret Halloran, NP
Nurse Practitioner · Ann Arbor, MINPI 1497220131
Payments from drug & device makers
Across 28 payments — averaging $23.29 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Astellas Pharma US Inc$191
- Exeltis, USA Inc.$128
- Sumitomo Pharma America, Inc.$68
- Exact Sciences$61
- Myriad Women's Health, Inc.$54
- AbbVie$36
- plus $115 from 5 others
What the payments were for
- Food & beverage$58490%
- Education$6810%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 | 9 | $191 |
| Exeltis, USA Inc. | 6 | $128 |
| Sumitomo Pharma America, Inc. | 1 | $68 |
| Exact Sciences | 3 | $61 |
| Myriad Women's Health, Inc. | 1 | $54 |
| AbbVie | 2 | $36 |
| Hologic Sales And Service, LLC | 2 | $32 |
| Bayer | 1 | $24 |
| Evofem Biosciences, Inc. | 1 | $23 |
| Duchesnay USA Incorporated | 1 | $19 |
| Mylan Pharmaceuticals Inc. | 1 | $17 |
How this compares
$652 in reported general payments places this provider in the 75th percentile of 3,351 nurse practitioner providers in Michigan.
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 |
|---|---|---|
| ProliaDenosumab | 11 | $18,729 |
| Estradiol | 83 | $5,041 |
| ValacyclovirValacyclovir Hcl | 27 | $1,622 |
| Clobetasol Propionate | 11 | $734 |
| Medroxyprogesterone Acetate | 11 | $508 |
| Metronidazole | 36 | $490 |
| Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip | 29 | $482 |
| Junel FeNorethindrone-E.Estradiol-Iron | 18 | $275 |
| Nystatin | 15 | $216 |
| Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst | 22 | $190 |
| Fluconazole | 36 | $158 |
| Alendronate Sodium | 14 | $129 |
Paid to pharmacies, not to this prescriber.
Other nurse practitioner in Ann Arbor
- Elizabeth KirshnerAnn Arbor$119K
- Susanne Mc DevittAnn Arbor$23K
- Jennifer DubnickiAnn Arbor$19K
- Ashley KliszAnn Arbor$19K
- Caitlin BoyakAnn Arbor$14K
- Rebecca PriebeAnn Arbor$13K
- Tara WilliamsonAnn Arbor$13K
- Kimberly DimariaAnn Arbor$12K
- Christopher NaismithAnn Arbor$10K
- Diane BohnAnn Arbor$8K
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.