Timothy T. Walker, FNP
NPI 1366903023ActiveIndividual· Nurse Practitioner, Family· Festus, MO
Nurse Practitioner, Family (FNP) with Mercy East Ambulatory Services LLC, practicing in Festus, Missouri. Their prescriptions cost Medicare Part D more than their services did: $30,789 for 849 claims, against $17,794 paid for services in 2024. Pfizer Inc. was the largest of 3 companies reporting payments in 2025, $76.31 in all, mostly food and beverage.
Overview
| NPI | 1366903023 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP |
| Sole proprietor | No |
| NPI issued | Mar 26, 2019 |
| Last updated in NPPES | Jul 9, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 2019008131 | MO |
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 (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 191 |
|---|---|
| Services billed | 597 across 36 procedure codes |
| Paid by Medicare | $17,794 |
Part D prescriptions in 2024
| Prescriptions (claims) | 849 · 865 30-day fills |
|---|---|
| Patients | 408 |
| Total drug cost | $30,789 |
| Generic share | 94% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Mercy East Ambulatory Services LLCChesterfield, MO · 105 clinicians
Industry payments (Open Payments)
- 2025$76.31 · 4 payments from 3 companies
- 2024$33.14 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $36.72 | 2 |
| Amgen Inc. | $24.30 | 1 |
| Optinose US, Inc. | $15.29 | 1 |
What the 2025 payments were for
- Food and Beverage$76.31 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 36 family nurse practitioners in Festus · All family nurse practitioners in Missouri