Karl P. Undesser, MD
NPI 1013961242ActiveIndividual· Internal Medicine, Clinical Cardiac Electrophysiology· Caldwell, ID
Internal Medicine, Clinical Cardiac Electrophysiology (MD) in Caldwell, Idaho, trained at University of Texas Medical School at San Antonio (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $1,679,601 for 6,018 claims, against $172,208 paid for services in 2024. Medtronic, Inc. was the largest of 10 companies reporting payments in 2025, $3,589 in all, mostly food and beverage.
Overview
| NPI | 1013961242 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 20, 2006 |
| Last updated in NPPES | Jan 27, 2022 |
| Certified by provider | Nov 30, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Clinical Cardiac Electrophysiology Primary | 207RC0001X | M6986 | ID |
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 - Cardiac Electrophysiology (ID) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 764 |
|---|---|
| Services billed | 2,463 across 54 procedure codes |
| Paid by Medicare | $172,208 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,018 · 15,167 30-day fills |
|---|---|
| Patients | 857 |
| Total drug cost | $1,679,601 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at San Antonio |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Cardiac Electrophysiology |
| Secondary specialties | Cardiovascular Disease (Cardiology) |
Medical group
- West Valley Medical Group Specialty Services LLCCaldwell, ID · 5 clinicians
Hospital affiliations
- St Luke's Nampa Medical CenterNampa, ID
- St Luke's Regional Medical CenterBoise, ID
- Weiser Memorial HospitalWeiser, ID
- West Valley Medical CenterCaldwell, ID
Industry payments (Open Payments)
- 2025$3,589 · 49 payments from 10 companies
- 2024$1,643 · 44 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $2,377 | 15 |
| E.R. Squibb & Sons, L.L.C. | $401.46 | 6 |
| Boston Scientific Corporation | $328.17 | 13 |
| Abbott Laboratories | $178.46 | 6 |
| Atricure, Inc. | $166.89 | 1 |
What the 2025 payments were for
- Food and Beverage$2,553 · 43 payments
- Travel and Lodging$1,036 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records