David Simeon Costner, APRN NP-BC
Opted out of Medicare from April 2026 to April 2028. Nurse Practitioner (APRN NP-BC) in Plains, Montana, licensed in MT, with an NPI issued in December 2010. Their prescriptions cost Medicare Part D more than their services did: $311,533 for 3,882 claims, against $52,937 paid for services in 2024. Phathom Pharmaceuticals, Inc. reported $11.93 in payments in 2025, mostly food and beverage. Lists Baxter Health and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1346542867 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APRN NP-BC |
| Sole proprietor | Yes |
| NPI issued | Dec 4, 2010 |
| Last updated in NPPES | Apr 24, 2026 |
| Certified by provider | Apr 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 102425 | MT |
| Nurse Practitioner | 363L00000X | NUR-APRN-LIC-102425 | MT |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Apr 1, 2026 – Apr 1, 2028 |
| Can order and refer | Yes |
| Accepts assignment | Yes (participating) |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Medicare services in 2024
| Medicare patients | 250 |
|---|---|
| Services billed | 1,025 across 36 procedure codes |
| Paid by Medicare | $52,937 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,882 · 9,493 30-day fills |
|---|---|
| Patients | 283 |
| Total drug cost | $311,533 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Hospital affiliations
- Baxter HealthMountain Home, AR
- Clark Fork Valley HospitalPlains, MT
- St. Patrick HospitalMissoula, MT
Industry payments (Open Payments)
- 2025$11.93 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $11.93 | 1 |
What the 2025 payments were for
- Food and Beverage$11.93 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Nurse Practitioner providers in Plains
- 1417424854