Andrea Walker, APRN-CNP
NPI 1285226340ActiveIndividual· Nurse Practitioner, Family· Collinsville, OK
Nurse Practitioner, Family (APRN-CNP) with Warren Clinic Inc, practicing in Collinsville, Oklahoma. Their prescriptions cost Medicare Part D more than their services did: $211,821 for 1,250 claims, against $36,941 paid for services in 2024. Amgen Inc. was the largest of 13 companies reporting payments in 2025, $356.71 in all, mostly food and beverage. Lists Ascension St John Jane Phillips and 1 other hospital as hospital affiliations.
Overview
| NPI | 1285226340 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APRN-CNP |
| Sole proprietor | Yes |
| NPI issued | Feb 9, 2021 |
| Last updated in NPPES | Jul 15, 2022 |
| Certified by provider | Jul 15, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 207888 | OK |
| Registered Nurse | 163W00000X | 116016 | OK |
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) | Enrolled Practitioner - Nurse Practitioner (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 342 |
|---|---|
| Services billed | 995 across 13 procedure codes |
| Paid by Medicare | $36,941 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,250 · 2,835 30-day fills |
|---|---|
| Patients | 312 |
| Total drug cost | $211,821 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Warren Clinic IncTulsa, OK · 883 clinicians
Hospital affiliations
- Ascension St John Jane PhillipsBartlesville, OK
- Saint Francis Hospital, IncTulsa, OK
Industry payments (Open Payments)
- 2025$356.71 · 18 payments from 13 companies
- 2024$148.83 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $53.76 | 3 |
| Alnylam Pharmaceuticals Inc. | $47.17 | 2 |
| Abiomed | $42.64 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $32.83 | 2 |
| Scpharmaceuticals Inc. | $32.71 | 2 |
What the 2025 payments were for
- Food and Beverage$356.71 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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