Mariann Williams, NP
NPI 1922166776ActiveIndividual· Nurse Practitioner· Tonasket, WA
Nurse Practitioner (NP) with Okanogan County Public Hospital Dist No 4, practicing in Tonasket, Washington. Part D covered 617 prescriptions written in 2024, 87% of them generic. Lists North Valley Hospital as a hospital affiliation.
Overview
| NPI | 1922166776 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | No |
| NPI issued | Dec 5, 2006 |
| Last updated in NPPES | Dec 4, 2025 |
| Certified by provider | Dec 4, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | AP30003589 | WA |
| Nurse Practitioner | 363L00000X | RN00056504 | WA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (WA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 617 · 992 30-day fills |
|---|---|
| Patients | 143 |
| Total drug cost | $59,136 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1994 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Okanogan County Public Hospital Dist No 4Tonasket, WA · 42 clinicians
Hospital affiliation
- North Valley HospitalTonasket, WA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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