Kirsten Oosterbaan, PA-C
NPI 1306202072ActiveIndividual· Physician Assistant, Medical· Grand Rapids, MI
Physician Assistant, Medical (PA-C) with Spectrum Health Primary Care Partners, practicing in Grand Rapids, Michigan. Their prescriptions cost Medicare Part D more than their services did: $36,382 for 455 claims, against $1,971 paid for services in 2024. Exact Sciences Corporation was the largest of 2 companies reporting payments in 2025, $47.79 in all, mostly food and beverage. Lists Sheridan Community Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1306202072 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Jan 11, 2016 |
| Last updated in NPPES | Feb 25, 2021 |
| Certified by provider | Feb 25, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | 5601007651 | MI |
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 - Physician Assistant (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 15 |
|---|---|
| Services billed | 31 across 6 procedure codes |
| Paid by Medicare | $1,971 |
Part D prescriptions in 2024
| Prescriptions (claims) | 455 · 948 30-day fills |
|---|---|
| Patients | 124 |
| Total drug cost | $36,382 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Spectrum Health Primary Care PartnersGrand Rapids, MI · 2,294 clinicians
Hospital affiliations
- Sheridan Community HospitalSheridan, MI
- Spectrum Health United HospitalGreenville, MI
Industry payments (Open Payments)
- 2025$47.79 · 3 payments from 2 companies
- 2024$111.70 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $31.85 | 2 |
| Lilly USA, LLC | $15.94 | 1 |
What the 2025 payments were for
- Food and Beverage$47.79 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 106 physician assistants in Grand Rapids · All physician assistants in Michigan