NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Michael A. Williams, Dc

Sports Physician Chiropractor in O Fallon, MO · enumerated 2008 · authorized official Michael Williams, President.

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

National Provider Identifier

1902064223

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Michael A. Williams, Dc
Practice address 8633 Mexico Rd, O Fallon, MO, 63366
Phone (636) 272-8888
Enumeration date May 23, 2008
Last updated in NPPES Feb 28, 2012

Taxonomy & classification

111NS0005X Sports Physician Chiropractor Chiropractic Providers · License CD-006167 (MO) Primary

Authorized official

Name Michael Williams
Title President
Phone (636) 272-8888

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Michael A. Williams, Dc?
Michael A. Williams, Dc is registered in NPPES as a Sports Physician Chiropractor (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-28.