Quick answers
- Which hospitals does Kenneth Madsen work at?
- Medicare's official clinician data lists Kenneth Madsen at 4 hospitals: Grande Ronde Hospital, Saint Alphonsus Medical Center - Nampa, Saint Alphonsus Medical Center Ontario and Saint Alphonsus Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Kenneth Madsen see patients?
- Medicare's clinician data lists 4 practice locations, including Boise, ID, Meridian, ID and Nampa, ID. Call before your visit to confirm the address.
- What is Kenneth Madsen's specialty?
- Medicare lists Vascular Surgery as the primary specialty.
- Does Kenneth Madsen accept Medicare assignment?
- Yes. Medicare's clinician data says Kenneth Madsen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Kenneth Madsen?
- (208) 367-2121, as listed in official Medicare / NPI Registry data.
- What is Kenneth Madsen's NPI number?
- 1164412862. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Kenneth Madsen works
Medicare's Facility Affiliation Data lists Kenneth Madsen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Grande Ronde HospitalLa Grande, OR · Critical Access Hospital · CCN 381321
- Saint Alphonsus Medical Center - NampaNampa, ID · Acute Care Hospital · CCN 130013
- Saint Alphonsus Medical Center OntarioOntario, OR · Acute Care Hospital · CCN 380052
- Saint Alphonsus Regional Medical CenterBoise, ID · Acute Care Hospital · CCN 130007
Practice locations
Addresses where Kenneth Madsen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1055 N Curtis RdBoise, ID 83706 (208) 367‑2121
- 1075 N Curtis RdBoise, ID 83706 (208) 302‑2000
- 3025 W Cherry LnMeridian, ID 83642
- 4300 E Flamingo AveNampa, ID 83687 (208) 205‑1000
Group practices
Medicare enrollment lists Kenneth Madsen as a member of this group (CMS data updated 2026-10-02).
- Saint Alphonsus Regional Medical Center Inc680 clinicians in the group
Specialties
- Vascular Surgeryprimary
Other vascular surgeons in Boise
Clinicians with the same Medicare primary specialty in Boise, ID — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164412862 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians