Robert B. Prehn, M.D.
NPI 1407859523ActiveIndividual· Otolaryngology· Neenah, WI
Otolaryngology (M.D.) in Neenah, Wisconsin, trained at University of Wisconsin School of Medicine (class of 1991). 143 Medicare patients in 2024, $24,501 paid; nearly all of their 491 Part D prescriptions were generic (96%). Amgen Inc. was the largest of 2 companies reporting payments in 2025, $51.71 in all, mostly education.
Overview
| NPI | 1407859523 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 23, 2005 |
| Last updated in NPPES | Mar 10, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Otolaryngology Primary | 207Y00000X | 33668-20 | WI |
| Specialist | 174400000X | 33668 | 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 - Otolaryngology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 143 |
|---|---|
| Services billed | 598 across 41 procedure codes |
| Paid by Medicare | $24,501 |
Part D prescriptions in 2024
| Prescriptions (claims) | 491 · 842 30-day fills |
|---|---|
| Patients | 209 |
| Total drug cost | $17,182 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Otolaryngology |
Medical group
- Ear Nose and Throat Specialists of Wisconsin SCNeenah, WI · 28 clinicians
Hospital affiliations
- Ascension Ne Wisconsin - St Elizabeth CampusAppleton, WI
- Aurora Medical Ctr OshkoshOshkosh, WI
- Thedacare Regional Med Ctr - NeenahNeenah, WI
- Thedacare Regional Medical Center - Appleton IncAppleton, WI
Industry payments (Open Payments)
- 2025$51.71 · 2 payments from 2 companies
- 2024$36.73 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $34.00 | 1 |
| Optinose US, Inc. | $17.71 | 1 |
What the 2025 payments were for
- Education$34.00 · 1 payment
- Food and Beverage$17.71 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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