Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Heather Mattson, MSW, LCSW

Clinical Social Worker in Menasha, WI · enumerated 2023 · practices at Family Services of Northeast Wisconsin Inc.

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

National Provider Identifier

1114790086

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Registry record

Entity type Individual (Type 1)

Name Heather Mattson

Credential MSW, LCSW

Sex Female

Practice address 1810 Appleton Rd, Menasha, WI, 54952

Phone (920) 739-4226

Fax (920) 739-7639

Enumeration date Nov 2, 2023

Last updated in NPPES Jul 14, 2025

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 12431 (WI) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

Other identifiers

Identifier	Type	State	Issuer
132927	Other	WI	STATE LICENSE
12431	Other	WI	STATE LICENSE

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 Heather Mattson?

Heather Mattson is registered in NPPES with the primary taxonomy of Clinical Social Worker. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-14.