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Sarah L. Mcmahon, Lcsw, LLC

Clinical Social Worker in Lombard, IL · enumerated 2016 · authorized official Sarah Mcmahon, Manager/Clinician.

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

National Provider Identifier

1790227742

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Registry record

Entity type Organization (Type 2)
Legal business name Sarah L. Mcmahon, Lcsw, LLC
Practice address 450 E 22nd St, Suite 150, Lombard, IL, 60148
Phone (312) 404-2191
Enumeration date Nov 8, 2016
Last updated in NPPES Nov 8, 2016

Taxonomy & classification

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 149014463 (IL) Primary

Authorized official

Name Sarah Mcmahon
Title Manager/Clinician
Phone (312) 404-2191

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.

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Frequently asked questions

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Sarah L. Mcmahon, Lcsw, LLC?
Sarah L. Mcmahon, Lcsw, LLC is registered in NPPES as a Clinical Social Worker (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-11-08.