Louis L. Westenfelder, PA-C
Physician Assistant · Missoula, MT
Louis L. Westenfelder, PA-C is a physician assistant with a practice address in Missoula, Montana, and NPI 1518917418, issued on May 11, 2006. Check the license (Montana 457, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Louis L. Westenfelder
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 457 MT
Self-reported in NPPES; status is on the state search - Practice location
- 2360 Mullan RD, Missoula, MT 59808
- Phone
- (406) 721-4436
- Enumerated
- May 11, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (406) 721-6053
- Medicare enrollment
- Enrolled (PECOS I20060605000231); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 698 in Montana → Look up another NPI →
Also registered at 2360 Mullan RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Joan Bond-Deschamps, PA-CPhysician Assistant1790726115
- Robert Botkin, P.T.Physical Therapist1730157165
- Rayme Caton, ATC, NCBMTAthletic Trainer1295797371
- Mark Channer, M.D.Orthopaedic Surgery Physician1649259441
- Cynthia Cleveland, DPTPhysical Therapist1588079016
Verify Louis L. Westenfelder in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license 457Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average physician assistant in 2024
101 Medicare Part D claims for 74 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 54 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen46 claims
- Hydroxyzine Pamoate20 claims
- Meloxicam13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Missoula Bone And Joint LLCMissoula, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Louis L. Westenfelder among 698 physician assistant records in Montana
Louis L. Westenfelder, PA-C is one of 698 physician assistant records with a practice address in Montana. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 77% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2004 · median 2016 among the 514 with a school on file
- Record last updated2023 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
119 physician assistant records list a practice address in Missoula
They are 119 of the 3,567 NPPES records with a practice address in Missoula, and 698 physician assistant records in Montana.
All 698 in Montana → Every provider in Missoula → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Molly Anderson, PA-CMissoula, MT 598081750797676
- Meagan Auch, PA-CMissoula, MT 598081154534691
- Joan Bond-Deschamps, PA-CMissoula, MT 598081790726115
- Lindsey Gardner, PA-CMissoula, MT 598081366615098
- Lance Griffin, PA-CMissoula, MT 598081700212198
- Douglas Henry, PA-CMissoula, MT 598081275512071
- Clyde Kidd, PA-CMissoula, MT 598081386997229
- Whitney Martin, PA-C, RDMissoula, MT 598081316049695
Common questions
What is Louis L. Westenfelder, PA-C's NPI number?
Louis L. Westenfelder, PA-C's National Provider Identifier (NPI) is 1518917418, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Louis L. Westenfelder, PA-C located?
The NPPES record lists a practice address at 2360 Mullan RD, Missoula, MT, 59808. Phone: (406) 721-4436. Providers update this record themselves, so call before visiting.
How can I verify Louis L. Westenfelder, PA-C's license?
NPPES lists Montana license number 457, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
How much does Louis L. Westenfelder, PA-C prescribe under Medicare Part D?
In 2024, Louis L. Westenfelder, PA-C had 101 Medicare Part D claims for 74 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.