Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gary James Hagner, D.C.
Chiropractor in Saint Peters, MO · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1154452647
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Registry record
Entity type Individual (Type 1)
Name Dr. Gary James Hagner
Credential D.C.
Sex Male
Practice address 4087 Veterans Memorial Pkwy, Saint Peters, MO, 63376
Phone (636) 447-1717
Fax (636) 922-9124
Enumeration date Mar 8, 2007
Last updated in NPPES Aug 13, 2012
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC credential
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.
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 Gary Hagner?
Gary Hagner is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-08-13.