Mary Elizabeth O'Brien, CRNP
NPI 1578554887ActiveIndividual· Nurse Practitioner, Primary Care· Laurel, MD
Nurse Practitioner, Primary Care (CRNP) in Laurel, Maryland, licensed in MD, with an NPI issued in November 2005. Enrolled in Medicare as practitioner - nurse practitioner. Alexion Pharmaceuticals, Inc. reported $105.28 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1578554887 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | CRNP |
| Sole proprietor | No |
| NPI issued | Nov 4, 2005 |
| Last updated in NPPES | Jul 6, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Primary Care Primary | 363LP2300X | R073974 | MD |
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 - Nurse Practitioner (DC) |
|---|
Industry payments (Open Payments)
- 2025$105.28 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alexion Pharmaceuticals, Inc. | $105.28 | 1 |
What the 2025 payments were for
- Food and Beverage$105.28 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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