Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arlene Ross Langley, LCSW

Clinical Social Worker in Downers Grove, IL · enumerated 2006 · practices at Mosaic Mind Counseling LLC.

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

National Provider Identifier

1841389954

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Registry record

Entity type Individual (Type 1)

Name Arlene Ross Langley

Credential LCSW

Sex Female

Practice address 728 Ogden Ave Ste E, Downers Grove, IL, 60515

Phone (715) 617-6000

Fax (630) 541-6557

Enumeration date Oct 12, 2006

Last updated in NPPES Jul 26, 2019

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 6858-123 (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
40973800	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

What is the NPI number for Arlene Langley?

The National Provider Identifier (NPI) for Arlene Langley is 1841389954, a Type 1 (individual) record in the CMS NPPES registry.

Where does Arlene Langley practice?

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

Other providers at this practice address

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Mosaic Mind Counseling LLC Clinical Social Worker · Downers Grove, IL NPI 1235781253

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-26.