Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Weston Allen Holzinger, D.C.
Chiropractor in O Fallon, IL · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1003361783
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Registry record
Entity type Individual (Type 1)
Name Dr. Weston Allen Holzinger
Credential D.C.
Sex Male
Practice address 922 Talon Dr, Suite B, O Fallon, IL, 62269
Phone (618) 622-1200
Enumeration date Aug 23, 2016
Last updated in NPPES Aug 23, 2016
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
Where does Weston Holzinger practice?
The practice location on file with NPPES is in O Fallon, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Weston Holzinger?
The National Provider Identifier (NPI) for Weston Holzinger is 1003361783, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-08-23.