Daniel S. Wientzen, DO
NPI 1952417248ActiveIndividual· Family Medicine· Decorah, IA
Family Medicine (DO) with Gundersen Clinic Ltd and 1 other group, practicing in Decorah, Iowa. Their prescriptions cost Medicare Part D more than their services did: $656,546 for 9,253 claims, against $185,593 paid for services in 2024. Lists Gundersen Lutheran Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1952417248 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Aug 21, 2006 |
| Last updated in NPPES | Nov 18, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 3864 | IA |
| Family Medicine | 207Q00000X | DO-R-8208 | IA |
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 - Family Practice (IA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 552 |
|---|---|
| Services billed | 9,628 across 145 procedure codes |
| Paid by Medicare | $185,593 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,253 · 17,761 30-day fills |
|---|---|
| Patients | 484 |
| Total drug cost | $656,546 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Family Practice |
| Secondary specialties | Emergency Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Gundersen Clinic LtdOnalaska, WI · 418 clinicians
- Gundersen Regional Clinics, LLCDecorah, IA · 53 clinicians
Hospital affiliations
- Gundersen Lutheran Medical CenterLa Crosse, WI
- Gundersen Palmer Lutheran Hospital and ClinicsWest Union, IA
- Regional Health Services of Howard CountyCresco, IA
- WinnmedDecorah, IA
Other facilities
- Winnmed Home HealthHome health agency · Decorah, IA
- St Croix HospiceHospice · Strawberry Point, IA
- Winnmed HospiceHospice · Decorah, IA
- The HighlandsNursing home · Decorah, IA
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 27 family medicine physicians in Decorah · All family medicine physicians in Iowa