MICHAEL O'HALLERAN
Allopathic & Osteopathic Physicians|Pediatrics BROOKLYN, NY NPI 1043672835
Browse related groups: Allopathic & Osteopathic Physicians|Pediatrics NY Merck Sharp & Dohme Corporation All categories
General Payments — all program years on this page
$148.32
- Category: General Payments
- Program years: PY2019–2021
- Record count: 8
- As of (CMS publication): 2026-01-23
Latest program year (PY2021): $74.65 across 4 records · disputed records: 0
Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.
How this figure is calculated
- The total is the sum of the General Payments records CMS published for the labeled program year(s), exactly as published. Nothing is estimated, weighted, or combined across categories.
- General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
- Featured-page threshold (a presentation gate, not a judgment): records>=3 OR total>=100 (all years).
- Methodology & Data — sourcing, labeling, and limitations.
By nature of payment
Latest program year (PY2021) · sorted by reported total.
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $74.65 | 4 |
By paying entity
Latest program year (PY2021) · sorted by reported total.
| Paying entity | Amount | Records |
|---|---|---|
| Merck Sharp & Dohme Corporation | $42.40 | 2 |
| Ultragenyx Pharmaceutical Inc. | $19.05 | 1 |
| Kaleo, Inc. | $13.20 | 1 |
By program year
Records — PY2021 (4)
| Record ID | Paying entity | Amount | Date | Nature of payment | Dispute status | Published | Source |
|---|---|---|---|---|---|---|---|
| 832124597 | kaleo, Inc. | $13.20 | 03/17/2021 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 848414605 | Merck Sharp & Dohme Corporation | $23.79 | 01/21/2021 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 848551661 | Merck Sharp & Dohme Corporation | $18.61 | 04/21/2021 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
| 848965109 | Ultragenyx Pharmaceutical Inc. | $19.05 | 01/13/2021 | Food and Beverage | Undisputed | 01/23/2026 | View at CMS |
Provenance & corrections
- Dataset: CMS Open Payments — General Payments
- Source: CMS Open Payments dataset (bulk file)
- Publisher of source data: Centers for Medicare & Medicaid Services
- Generated from: OP_DTL_GNRL_PGYR2021_P01232026_01102026.csv
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Corrections to the substance of a record route to CMS through its review-and-dispute process; errors in how this site mirrors or displays a record route to us. Both paths are described in Methodology & Data.