Lon Madsen, DO
NPI 1558433052 · Family Medicine Physician · Spokane, WA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lon Madsen, DO is a Family Medicine Physician provider in Spokane, WA (NPI 1558433052).
Provider details
- NPI number
- 1558433052
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 008315 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
404 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 144 | $127 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 121 | $90 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 97 | $179 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 42 | $14 |
Typical Medicare-allowed amounts for these services range $14–$179 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 150 | 37 |
| Atorvastatin Calcium | 135 | 40 |
| Losartan Potassium | 123 | 38 |
| Metformin Hcl | 88 | 24 |
| Rosuvastatin Calcium | 80 | 21 |
| Metoprolol Succinate | 79 | 21 |
| Amlodipine Besylate |
Practice location
Mailing address
Additional practice locations (1)
- 1050 Gail Gardner Way Ste 300Prescott, AZ 86305-1640Phone: (928) 717-5232Fax: (928) 717-5238
Registry dates
- Enumerated
- 2006-11-14
- Last updated
- 2023-03-07
- Certified
- 2021-08-03
Frequently asked questions
- What is Lon Madsen's NPI number?
- Lon Madsen's National Provider Identifier (NPI) is 1558433052, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lon Madsen's specialty?
- Lon Madsen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lon Madsen located?
- Lon Madsen's practice location on file with NPPES is 9708 N Nevada St Ste 203, Spokane, WA 99218-6004.
- What is Lon Madsen's phone number?
- The practice phone number listed in the NPPES registry for Lon Madsen is (509) 863-9240.
- Does Lon Madsen accept Medicare?
- Lon Madsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lon Madsen's NPI active?
- Yes — Lon Madsen's NPI (1558433052) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.