Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark Winslow Williams, D.C.
Chiropractor in Fort Worth, TX · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1972590321
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark Winslow Williams
Credential D.C.
Sex Male
Practice address 2121 N Main St, Fort Worth, TX, 76164
Phone (817) 624-7222
Fax (817) 624-7233
Enumeration date Sep 30, 2005
Last updated in NPPES Sep 27, 2023
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 Mark Williams practice?
The practice location on file with NPPES is in Fort Worth, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Williams?
The National Provider Identifier (NPI) for Mark Williams is 1972590321, 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 2023-09-27.