Freddie J. Mertzig, APNP
NPI 1922523836ActiveIndividual· Nurse Practitioner, Gerontology· Milwaukee, WI
Nurse Practitioner, Gerontology (APNP) with Sheboygan Physicians Group S.C., practicing in Milwaukee, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $231,557 for 4,562 claims, against $37,454 paid for services in 2024. Abbvie Inc. was the largest of 2 companies reporting payments in 2025, $88.33 in all, mostly food and beverage. Lists St Nicholas Hospital as a hospital affiliation.
Overview
| NPI | 1922523836 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APNP |
| Sole proprietor | No |
| NPI issued | Aug 11, 2017 |
| Last updated in NPPES | Sep 25, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Gerontology Primary | 363LG0600X | 7889-33 | WI |
| Nurse Practitioner | 363L00000X | 7889-33 | 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 - Nurse Practitioner (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 340 |
|---|---|
| Services billed | 1,862 across 77 procedure codes |
| Paid by Medicare | $37,454 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,562 · 10,135 30-day fills |
|---|---|
| Patients | 1,238 |
| Total drug cost | $231,557 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Sheboygan Physicians Group S.C.Sheboygan, WI · 15 clinicians
Hospital affiliation
- St Nicholas HospitalSheboygan, WI
Industry payments (Open Payments)
- 2025$88.33 · 4 payments from 2 companies
- 2024$14.05 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $68.25 | 3 |
| Corium, LLC | $20.08 | 1 |
What the 2025 payments were for
- Food and Beverage$88.33 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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