Nathan T. Zwagerman, M.D.
NPI 1689970543ActiveIndividual· Neurological Surgery· Milwaukee, WI
Neurological Surgery (M.D.) in Milwaukee, Wisconsin, trained at Wayne State University School of Medicine (class of 2010). Mostly services rather than prescriptions: Medicare paid $91,211 for 204 patients in 2024, with only 28 Part D claims. Collagen Matrix, Inc reported $31,450 in payments in 2025, mostly consulting fees.
Overview
| NPI | 1689970543 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 9, 2011 |
| Last updated in NPPES | Oct 5, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | 66696 | WI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Neurosurgery (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 204 |
|---|---|
| Services billed | 353 across 50 procedure codes |
| Paid by Medicare | $91,211 |
Part D prescriptions in 2024
| Prescriptions (claims) | 28 · 56 30-day fills |
|---|---|
| Patients | 16 |
| Total drug cost | $863.49 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Wayne State University School of Medicine |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Neurosurgery |
| Telehealth | Offers telehealth |
Medical group
- The Medical College of Wisconsin IncMilwaukee, WI · 2,115 clinicians
Hospital affiliations
- Ascension Ne Wisconsin - St Elizabeth CampusAppleton, WI
- Froedtert Memorial Lutheran HospitalMilwaukee, WI
- Froedtert South Inc.Kenosha, WI
- St Josephs Community Hospital West BendWest Bend, WI
Industry payments (Open Payments)
- 2025$31,450 · 1 payment from 1 company
- 2024$796.92 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Collagen Matrix, Inc | $31,450 | 1 |
What the 2025 payments were for
- Consulting Fee$31,450 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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