Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Aaron Clark, LSW

Social Worker in Lancaster, OH · enumerated 2018.

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

National Provider Identifier

1023500469

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Registry record

Entity type Individual (Type 1)

Name Aaron Clark

Credential LSW

Sex Male

Practice address 220 E Walnut St, Lancaster, OH, 43130

Phone (800) 321-8293

Enumeration date Jun 1, 2018

Last updated in NPPES Sep 14, 2026

Taxonomy & licenses

172V00000X Community Health Worker Other Service Providers Secondary

104100000X Social Worker Behavioral Health & Social Service Providers · License S.2308917 (OH) 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 1023500469 active?

Yes, as of the latest NPPES snapshot, NPI 1023500469 is active (record last updated 2026-09-14).

How do I verify Aaron Clark's NPI record?

Cross-check NPI 1023500469 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 2026-09-14.