Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. David Aaron Williamson, D.C.
Chiropractor in St Charles, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1720025927
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Registry record
Entity type Individual (Type 1)
Name Dr. David Aaron Williamson
Credential D.C.
Sex Male
Practice address 40w201 Wasco Rd Ste Ab, St Charles, IL, 60175
Phone (630) 377-7788
Fax (630) 377-7802
Enumeration date May 31, 2006
Last updated in NPPES Jun 26, 2020
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 David Williamson practice?
The practice location on file with NPPES is in St Charles, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for David Williamson?
The National Provider Identifier (NPI) for David Williamson is 1720025927, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-26.