Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Mary M Walther, LCSW

Marriage & Family Therapist in Wilmette, IL · enumerated 2006 · practices at Mary Lynn Meyers, Lcsw, Inc..

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

National Provider Identifier

1427066091

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Registry record

Entity type Individual (Type 1)

Name Mrs. Mary M Walther

Credential LCSW

Sex Female

Practice address 1167 Wilmette Ave, Suite 201, Wilmette, IL, 60091

Phone (847) 251-7350

Fax (847) 853-2600

Enumeration date Aug 3, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers 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
206905	Other	IL	MEDICARE

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 1427066091 active?

Yes, as of the latest NPPES snapshot, NPI 1427066091 is active (record last updated 2025-09-11).

How do I verify Mary Walther's NPI record?

Cross-check NPI 1427066091 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 2025-09-11.