Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret Clarke, LMSW

Social Worker in Ballwin, MO · enumerated 2023.

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

National Provider Identifier

1720783145

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Registry record

Entity type Individual (Type 1)

Name Margaret Clarke

Credential LMSW

Sex Female

Practice address 301 Sovereign Ct Ste 115, Ballwin, MO, 63011

Phone (636) 251-6277

Enumeration date Apr 4, 2023

Last updated in NPPES Apr 4, 2023

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers Primary

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 1720783145 active?

Yes, as of the latest NPPES snapshot, NPI 1720783145 is active (record last updated 2023-04-04).

How do I verify Margaret Clarke's NPI record?

Cross-check NPI 1720783145 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Nicole Rhodes Clinical Social Worker · Ballwin, MO NPI 1174112155 Whitney Palmer Griggs Clinical Social Worker · Ballwin, MO NPI 1912688086 Shayla Brosch Professional Counselor · Ballwin, MO NPI 1942034335 Marissa Barbeau Professional Counselor · Ballwin, MO NPI 1376369561 Ashleigh Jones Professional Counselor · Ballwin, MO NPI 1467347484 Ching-Huey Juang Mental Health Counselor · Ballwin, MO NPI 1700765229

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-04-04.