NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Nicholas Gietzen, D.O.

Family Medicine Physician in New Glarus, WI · enumerated 2006 · practices at Kemell Health LLC.

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

National Provider Identifier

1538178025

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Registry record

Entity type Individual (Type 1)
Name Dr. John Nicholas Gietzen
Credential D.O.
Sex Male
Practice address W5491 Windmill Ridge Rd, New Glarus, WI, 53574
Phone (608) 518-3654
Fax (928) 277-4942
Enumeration date Aug 5, 2006
Last updated in NPPES Nov 28, 2022

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 4158 (AZ) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
F100847814 Other WI PTAN
1487274247 Other IL NPI
Z178595 Other AZ MEDICARE PTAN

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 NPI 1538178025 active?
Yes, as of the latest NPPES snapshot, NPI 1538178025 is active (record last updated 2022-11-28).
How do I verify John Gietzen's NPI record?
Cross-check NPI 1538178025 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 2022-11-28.