Ashley Susan Tiemeyer Theisen, PA-C
NPI 1770103210ActiveIndividual· Physician Assistant· Holland, MI
Physician Assistant (PA-C) with Spectrum Health Primary Care Partners, practicing in Holland, Michigan. Their prescriptions cost Medicare Part D more than their services did: $734,430 for 3,397 claims, against $27,074 paid for services in 2024. Lists Corewell Health Zeeland Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1770103210 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Apr 24, 2020 |
| Last updated in NPPES | Aug 26, 2024 |
| Certified by provider | Aug 26, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 5601009787 | 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 | 249 |
|---|---|
| Services billed | 538 across 8 procedure codes |
| Paid by Medicare | $27,074 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,397 · 8,305 30-day fills |
|---|---|
| Patients | 855 |
| Total drug cost | $734,430 |
| Generic share | 79% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Spectrum Health Primary Care PartnersGrand Rapids, MI · 2,294 clinicians
Hospital affiliations
- Corewell Health Zeeland HospitalZeeland, MI
- Holland HospitalHolland, MI
- Spectrum HealthGrand Rapids, MI
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 63 physician assistants in Holland · All physician assistants in Michigan