Quick answers
- Does Louis L. Westenfelder accept Medicare assignment?
- Yes. Medicare's clinician data says Louis L. Westenfelder accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Louis L. Westenfelder see?
- In 2024, CMS data shows 337 Original Medicare patients and 1,066 services for Louis L. Westenfelder. This counts Original Medicare only and measures volume, not quality.
- What is Louis L. Westenfelder's NPI number?
- 1518917418. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Louis L. Westenfelder, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 337 |
|---|---|
| Services billed to Medicare | 1,066 |
| Different services or procedures | 58 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)254 services
- Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)108 services
- X-ray of wrist, minimum of 3 views (73110)101 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)100 services
- X-ray of hand, minimum of 3 views (73130)97 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol61%
- High blood pressure60%
- Arthritis58%
- Depression22%
- Anxiety20%
- Diabetes19%
Practice locations
Addresses where Louis L. Westenfelder is enrolled with Medicare (CMS data updated October 2, 2026).
- 2360 Mullan Rd, Suite CMissoula, MT 59808 (406) 721‑4436
Group practices
Medicare enrollment lists Louis L. Westenfelder as a member of this group (CMS data updated October 2, 2026).
- Missoula Bone and Joint LLC57 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Missoula
Clinicians with the same Medicare primary specialty in Missoula, MT — not a recommendation.
Other clinicians in Missoula Bone and Joint LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518917418 |
| 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 October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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