Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John G. Lang, CPO

Prosthetist in Marshfield, WI · enumerated 2007.

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

National Provider Identifier

1730373713

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Registry record

Entity type Individual (Type 1)

Name John G. Lang

Credential CPO

Sex Male

Practice address 1000 N Oak Ave, Marshfield, WI, 54449

Phone (715) 387-5511

Enumeration date Aug 31, 2007

Last updated in NPPES Jul 18, 2008

Taxonomy & licenses

222Z00000X Orthotist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 1370 (PA) Secondary

224P00000X Prosthetist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 1370 (PA) 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 Lang?

John Lang is registered in NPPES with the primary taxonomy of Prosthetist. 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 2008-07-18.