Margot Mahon O'Neill, PA-C
NPI 1194809087ActiveIndividual· Internal Medicine, Hematology & Oncology· Durham, NC
Internal Medicine, Hematology & Oncology (PA-C) in Durham, North Carolina, trained at Duke University School of Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $318,644 for 636 claims, against $19,700 paid for services in 2024. Astellas Pharma US Inc was the largest of 3 companies reporting payments in 2025, $9,444 in all, mostly speaking and faculty fees.
Overview
| NPI | 1194809087 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Oct 25, 2006 |
| Last updated in NPPES | May 4, 2022 |
| Certified by provider | May 4, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 103873 | NC |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Physician Assistant (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 113 |
|---|---|
| Services billed | 375 across 5 procedure codes |
| Paid by Medicare | $19,700 |
Part D prescriptions in 2024
| Prescriptions (claims) | 636 · 885 30-day fills |
|---|---|
| Patients | 152 |
| Total drug cost | $318,644 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Duke University School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Duke Health Integrated Practice, IncDurham, NC · 3,185 clinicians
Hospital affiliation
- Duke University HospitalDurham, NC
Industry payments (Open Payments)
- 2025$9,444 · 18 payments from 3 companies
- 2024$583.95 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma US Inc | $9,367 | 15 |
| Caris Mpi, Inc. | $50.88 | 2 |
| Merck Sharp & Dohme LLC | $25.70 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$6,600 · 5 payments
- Travel and Lodging$2,401 · 5 payments
- Food and Beverage$417.37 · 7 payments
- Education$25.70 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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