Mary Ellen Zator Estes, NP
NPI 1447427000ActiveIndividual· Nurse Practitioner· Fairfax, VA
Nurse Practitioner (NP) with Privia Medical Group, LLC, practicing in Fairfax, Virginia. Their prescriptions cost Medicare Part D more than their services did: $10,350 for 151 claims, against $3,797 paid for services in 2024. Genzyme Corporation was the largest of 10 companies reporting payments in 2025, $623.97 in all, mostly food and beverage.
Overview
| NPI | 1447427000 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | No |
| NPI issued | May 13, 2008 |
| Last updated in NPPES | Aug 27, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 0024164568 | VA |
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); Practitioner - Nurse Practitioner (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 41 |
|---|---|
| Services billed | 90 across 16 procedure codes |
| Paid by Medicare | $3,797 |
Part D prescriptions in 2024
| Prescriptions (claims) | 151 · 352 30-day fills |
|---|---|
| Patients | 51 |
| Total drug cost | $10,350 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Privia Medical Group, LLCFairfax, VA · 1,533 clinicians
Industry payments (Open Payments)
- 2025$623.97 · 18 payments from 10 companies
- 2024$482.71 · 12 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $110.50 | 1 |
| Aimmune Therapeutics, Inc. | $109.62 | 1 |
| Axsome Therapeutics, Inc. | $104.79 | 1 |
| Amgen Inc. | $103.12 | 5 |
| Novo Nordisk Inc | $75.81 | 4 |
What the 2025 payments were for
- Food and Beverage$623.97 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 81 nurse practitioners in Fairfax · All nurse practitioners in Virginia