Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Ruth M Thielen, CCC SLP

Speech-Language Pathologist in West Allis, WI · enumerated 2008.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1386801884

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Registry record

Entity type Individual (Type 1)

Name Ms. Ruth M Thielen

Credential CCC SLP

Sex Female

Practice address 1126 S 70th Street Suite S305b, Wheaton Franciscan Rehab Services, West Allis, WI, 53214

Phone (414) 456-2336

Fax (414) 456-2339

Enumeration date May 21, 2008

Last updated in NPPES Oct 19, 2011

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 1647154 (WI) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Ruth Thielen?

Ruth Thielen is registered in NPPES with the primary taxonomy of Speech-Language Pathologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-19.