NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Jack Zellner, D.C.

Chiropractor in Boulder, CO · enumerated 2006.

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

National Provider Identifier

1013092048

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Registry record

Entity type Individual (Type 1)
Name Dr. Jack Zellner
Credential D.C.
Sex Male
Practice address Boulder, CO, 80304
Phone (303) 444-7524
Fax (303) 444-2464
Enumeration date Oct 26, 2006
Last updated in NPPES Mar 1, 2010

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 1261 (CO) Primary
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier Type State Issuer
COB4292 Other CO 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

What is the NPI number for Jack Zellner?
The National Provider Identifier (NPI) for Jack Zellner is 1013092048, a Type 1 (individual) record in the CMS NPPES registry.
Where does Jack Zellner practice?
The practice location on file with NPPES is in Boulder, CO. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-01.