Karl R. Westenfelder, M.D.
NPI 1174502173ActiveIndividual· Urology· Missoula, MT
Urology (M.D.) in Missoula, Montana, trained at Indiana University School of Medicine (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $1,729,940 for 1,120 claims, against $672,226 paid for services in 2024. Dendreon Pharmaceuticals LLC was the largest of 17 companies reporting payments in 2025, $873.22 in all, mostly food and beverage.
Overview
| NPI | 1174502173 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 10, 2006 |
| Last updated in NPPES | Apr 28, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | 8443 | MT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Urology (MT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 728 |
|---|---|
| Services billed | 7,917 across 101 procedure codes |
| Paid by Medicare | $672,226 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,120 · 1,924 30-day fills |
|---|---|
| Patients | 293 |
| Total drug cost | $1,729,940 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Urology |
Medical group
- Five Valleys UrologyMissoula, MT · 7 clinicians
Hospital affiliations
- Bitterroot Health - Daly HospitalHamilton, MT
- Community Medical CenterMissoula, MT
- Providence St Joseph Medical CenterPolson, MT
- St Peters HealthHelena, MT
- St. Patrick HospitalMissoula, MT
Industry payments (Open Payments)
- 2025$873.22 · 33 payments from 17 companies
- 2024$653.83 · 25 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dendreon Pharmaceuticals LLC | $220.43 | 4 |
| Boston Scientific Corporation | $162.05 | 5 |
| Abbvie Inc. | $59.86 | 3 |
| Astellas Pharma US Inc | $54.00 | 2 |
| Merck Sharp & Dohme LLC | $45.74 | 2 |
What the 2025 payments were for
- Food and Beverage$873.22 · 33 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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