Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Wendy Ann Diehls, APSW

Counselor in Brown Deer, WI · enumerated 2006.

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

National Provider Identifier

1023117439

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Registry record

Entity type Individual (Type 1)

Name Ms. Wendy Ann Diehls

Credential APSW

Sex Female

Practice address 3900 W Brown Deer Rd, Suite 200, Brown Deer, WI, 53209

Phone (414) 540-2170

Fax (414) 540-2171

Enumeration date Sep 22, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers Primary

Other identifiers

Identifier	Type	State	Issuer
41008800	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

Is NPI 1023117439 active?

Yes, as of the latest NPPES snapshot, NPI 1023117439 is active (record last updated 2007-07-08).

How do I verify Wendy Diehls's NPI record?

Cross-check NPI 1023117439 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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