Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ms. Nancy Duffey Black, MS, LICSW, CEAP, SAP

Clinical Social Worker in Wayzata, MN · enumerated 2009.

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

National Provider Identifier

1942449418

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Registry record

Entity type Individual (Type 1)

Name Ms. Nancy Duffey Black

Credential MS, LICSW, CEAP, SAP

Sex Female

Practice address Wayzata, MN, 55391

Phone (763) 443-3348

Fax (888) 244-9928

Enumeration date Feb 6, 2009

Last updated in NPPES Jul 15, 2016

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 06510 (MN) Primary

Other identifiers

Identifier	Type	State	Issuer
1427293851	Medicaid	MN	-

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

How do I verify Nancy Black's NPI record?

Cross-check NPI 1942449418 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1942449418 active?

Yes, as of the latest NPPES snapshot, NPI 1942449418 is active (record last updated 2016-07-15).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-07-15.