Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Daniel Barry Ludwig

Clinical Social Worker in Ballwin, MO · enumerated 2020.

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

National Provider Identifier

1659975043

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Registry record

Entity type Individual (Type 1)

Name Daniel Barry Ludwig

Sex Male

Practice address 111 Cascade Terrace Dr, Ballwin, MO, 63021

Phone (314) 229-3112

Enumeration date Nov 25, 2020

Last updated in NPPES Nov 25, 2020

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 001585 (MO) 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 1659975043 active?

Yes, as of the latest NPPES snapshot, NPI 1659975043 is active (record last updated 2020-11-25).

How do I verify Daniel Ludwig's NPI record?

Cross-check NPI 1659975043 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-25.