Gregory Jay Kosters, D.O.
NPI 1821076886ActiveIndividual· Family Medicine· Sibley, IA
Family Medicine (D.O.) with Avera McKennan, practicing in Sibley, Iowa. Their prescriptions cost Medicare Part D more than their services did: $458,542 for 10,483 claims, against $106,196 paid for services in 2024. Viatris Specialty LLC was the largest of 10 companies reporting payments in 2025, $324.69 in all, mostly food and beverage. Lists Avera McKennan Hospital & University Health Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1821076886 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jan 9, 2006 |
| Last updated in NPPES | Mar 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 02096 | IA |
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 - Family Practice (IA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 390 |
|---|---|
| Services billed | 6,153 across 70 procedure codes |
| Paid by Medicare | $106,196 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,483 · 18,917 30-day fills |
|---|---|
| Patients | 446 |
| Total drug cost | $458,542 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1984 |
|---|---|
| Medicare specialty | Family Practice |
| Secondary specialties | Emergency Medicine |
Medical group
- Avera McKennanSioux Falls, SD · 959 clinicians
Hospital affiliations
- Avera McKennan Hospital & University Health CenterSioux Falls, SD
- Osceola Community HospitalSibley, IA
Other facilities
- St Croix HospiceHospice · Spirit Lake, IA
- Sibley Specialty CareNursing home · Sibley, IA
Industry payments (Open Payments)
- 2025$324.69 · 19 payments from 10 companies
- 2024$349.83 · 20 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Viatris Specialty LLC | $69.09 | 4 |
| Abbvie Inc. | $57.47 | 3 |
| Pfizer Inc. | $49.18 | 3 |
| Novo Nordisk Inc | $35.77 | 2 |
| Amgen Inc. | $32.86 | 2 |
What the 2025 payments were for
- Food and Beverage$324.69 · 19 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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