Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Anthony J Louis, MSW

Social Worker in Marshfield, WI · enumerated 2006.

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

National Provider Identifier

1811099591

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Registry record

Entity type Individual (Type 1)

Name Anthony J Louis

Credential MSW

Sex Male

Practice address 1000 N Oak Ave, Marshfield, WI, 54449

Phone (715) 387-5002

Enumeration date Sep 2, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 3143 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
39697200	Medicaid	WI	-

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

Where does Anthony Louis practice?

The practice location on file with NPPES is in Marshfield, WI. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Anthony Louis?

The National Provider Identifier (NPI) for Anthony Louis is 1811099591, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.