Gregory N. Geissinger, PAC
NPI 1699882969ActiveIndividual· Physician Assistant· Marshfield, WI
Physician Assistant (PAC) with McHs Hospitals Inc and 1 other group, practicing in Marshfield, Wisconsin. Mostly services rather than prescriptions: Medicare paid $3,768 for 31 patients in 2024, with only 30 Part D claims. Lists Aspirus Ironwood Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1699882969 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PAC |
| Sole proprietor | No |
| NPI issued | Aug 24, 2006 |
| Last updated in NPPES | Nov 17, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 1225 | WI |
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 (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 31 |
|---|---|
| Services billed | 60 across 24 procedure codes |
| Paid by Medicare | $3,768 |
Part D prescriptions in 2024
| Prescriptions (claims) | 30 · 31 30-day fills |
|---|---|
| Patients | 20 |
| Total drug cost | $314.22 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical groups
- McHs Hospitals IncMarshfield, WI · 1,197 clinicians
- Aspirus Medical Group, Inc.Wausau, WI · 268 clinicians
Hospital affiliations
- Aspirus Ironwood HospitalIronwood, MI
- Aspirus Rhinelander HospitalRhinelander, WI
- Aspirus Stevens Point Hospital & Clinics, Inc.Stevens Point, WI
- Aspirus Wausau HospitalWausau, WI
- Marshfield Medical CenterMarshfield, WI
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 61 physician assistants in Marshfield · All physician assistants in Wisconsin