Tonya Elaine Buchanan, ANP-BC
NPI 1043556467ActiveIndividual· Nurse Practitioner, Adult Health· Saint Louis, MO
Nurse Practitioner, Adult Health (ANP-BC) with Oak Street Health Physicians Group of Missouri LLC, practicing in Saint Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $666,889 for 7,256 claims, against $8,224 paid for services in 2024. Exact Sciences Corporation reported $23.03 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1043556467 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ANP-BC |
| Sole proprietor | No |
| NPI issued | Dec 13, 2012 |
| Last updated in NPPES | Dec 13, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Adult Health Primary | 363LA2200X | 2012030521 | 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 | 72 |
|---|---|
| Services billed | 178 across 16 procedure codes |
| Paid by Medicare | $8,224 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,256 · 14,320 30-day fills |
|---|---|
| Patients | 656 |
| Total drug cost | $666,889 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Oak Street Health Physicians Group of Missouri LLCSaint Louis, MO · 26 clinicians
Industry payments (Open Payments)
- 2025$23.03 · 1 payment from 1 company
- 2024$295.55 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $23.03 | 1 |
What the 2025 payments were for
- Food and Beverage$23.03 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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