Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Chalko IV

Social Worker in Ludington, MI · enumerated 2014.

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

National Provider Identifier

1508268335

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Registry record

Entity type Individual (Type 1)

Name John Chalko IV

Sex Male

Practice address 920 Diana St, Ludington, MI, 49431

Phone (231) 845-6294

Fax (231) 845-7095

Enumeration date Sep 24, 2014

Last updated in NPPES Sep 24, 2014

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is John Chalko?

John Chalko is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-24.