Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Karl R. Westenfelder, M.D.
Urology Physician in Missoula, MT · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1174502173
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Karl R. Westenfelder
Credential M.D.
Sex Male
Practice address 2875 Tina Ave, Suite 101, Missoula, MT, 59808
Phone (406) 728-3366
Fax (406) 728-0651
Enumeration date Jan 10, 2006
Last updated in NPPES Apr 28, 2011
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0063947 | Medicaid | MT | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Karl Westenfelder?
Karl Westenfelder is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Whitney Martin Physician Assistant · Missoula, MT NPI 1316049695 Matthew D Munding, MD, Pllc Medical Specialty Clinic/Center · Missoula, MT NPI 1689749202 River Montana LLC Specialist · Missoula, MT NPI 1659724342 Trudi Mingus Speech-Language Pathologist · Missoula, MT NPI 1073059358 Heidi Waits Nurse Practitioner · Missoula, MT NPI 1174154108 Hannah Fouts Physical Therapist · Missoula, MT NPI 1497444350 Nicole Johnsen Physical Therapist · Missoula, MT NPI 1528991999
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-28.