Quick answers
- Where does Lon C. Madsen see patients?
- Medicare's clinician data lists 1 practice location in Spokane, WA. Call before your visit to confirm the address.
- What is Lon C. Madsen's specialty?
- Medicare lists Family Practice as the primary specialty, and also Osteopathic Manipulative Medicine.
- Does Lon C. Madsen accept Medicare assignment?
- Yes. Medicare's clinician data says Lon C. 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 Lon C. Madsen?
- (509) 290-6557, as listed in official Medicare / NPI Registry data.
- What is Lon C. Madsen's NPI number?
- 1558433052. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Lon C. Madsen is enrolled with Medicare (CMS data updated 2026-10-02).
- 9708 N Nevada St, Suite 203Spokane, WA 99218 (509) 290‑6557
Specialties
Other family doctors in Spokane
Clinicians with the same Medicare primary specialty in Spokane, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | College Of Osteo Med Of The Pacific At Pomona |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558433052 |
| 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
- 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