Louis Westenfelder, PA-C
NPI 1518917418 · Physician Assistant · Missoula, MT
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Westenfelder, PA-C is a Physician Assistant provider in Missoula, MT (NPI 1518917418).
Provider details
- NPI number
- 1518917418
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- 457 (MT)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
832 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 254 | $76 |
| X-Ray of Wrist, Minimum of 3 Views73110 | 101 | $34 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 100 | $93 |
| X-Ray of Hand, Minimum of 3 Views73130 | 97 | $31 |
| Injection Into Tendon Or Ligament20550 | 62 | $43 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 48 | $107 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 46 | 41 |
| Hydroxyzine Pamoate | 20 | 19 |
| Meloxicam | 13 | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-11
- Last updated
- 2023-03-07
Frequently asked questions
- What is Louis Westenfelder's NPI number?
- Louis Westenfelder's National Provider Identifier (NPI) is 1518917418, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Westenfelder's specialty?
- Louis Westenfelder is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Louis Westenfelder located?
- Louis Westenfelder's practice location on file with NPPES is 2360 Mullan Rd, Missoula, MT 59808-1811.
- What is Louis Westenfelder's phone number?
- The practice phone number listed in the NPPES registry for Louis Westenfelder is (406) 721-4436.
- Does Louis Westenfelder accept Medicare?
- Louis Westenfelder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Westenfelder's NPI active?
- Yes — Louis Westenfelder's NPI (1518917418) 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.