Graycen Duffy, ARNP
NPI 1851839682ActiveIndividual· Nurse Practitioner, Family· Walla Walla, WA
Nurse Practitioner, Family (ARNP) in Walla Walla, Washington, licensed in WA, with an NPI issued in January 2017. 370 Medicare patients in 2024, $37,989 paid; nearly all of their 710 Part D prescriptions were generic (90%). Lists Providence St Mary Medical Center as a hospital affiliation.
Overview
| NPI | 1851839682 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ARNP |
| Sole proprietor | No |
| NPI issued | Jan 31, 2017 |
| Last updated in NPPES | May 11, 2021 |
| Certified by provider | May 11, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | AP 60725057 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 370 |
|---|---|
| Services billed | 635 across 27 procedure codes |
| Paid by Medicare | $37,989 |
Part D prescriptions in 2024
| Prescriptions (claims) | 710 · 1,060 30-day fills |
|---|---|
| Patients | 299 |
| Total drug cost | $47,388 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Hospital affiliation
- Providence St Mary Medical CenterWalla Walla, 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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