Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Jacquelyn Mae Block, MFT, LCSW, LMFT

Clinical Social Worker in Fond Du Lac, WI · enumerated 2007.

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

National Provider Identifier

1336360429

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Registry record

Entity type Individual (Type 1)

Name Ms. Jacquelyn Mae Block

Credential MFT, LCSW, LMFT

Sex Female

Practice address 430 E Division St, Fond Du Lac, WI, 54935

Phone (920) 926-4209

Enumeration date May 2, 2007

Last updated in NPPES Dec 16, 2020

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 226-124 (WI) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 2841-123 (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
226-124	Other	WI	LMFT
2841-123	Other	WI	LCSW

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 Jacquelyn Block practice?

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

What is the NPI number for Jacquelyn Block?

The National Provider Identifier (NPI) for Jacquelyn Block is 1336360429, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-16.