NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Thomas St Clair Williams Sr., MD

Family Medicine Physician in Monroe, LA · enumerated 2006.

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

National Provider Identifier

1467422048

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Registry record

Entity type Individual (Type 1)
Name Dr. Thomas St Clair Williams Sr.
Credential MD
Sex Male
Practice address Monroe, LA, 71203
Phone (318) 343-6487
Fax (318) 343-7884
Enumeration date Jan 25, 2006
Last updated in NPPES Dec 14, 2009

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 022964 (LA) Primary
207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License MD022964 (LA) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
1685895 Medicaid LA -

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.

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Frequently asked questions

What is the NPI number for Thomas Williams?
The National Provider Identifier (NPI) for Thomas Williams is 1467422048, a Type 1 (individual) record in the CMS NPPES registry.
Where does Thomas Williams practice?
The practice location on file with NPPES is in Monroe, LA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-12-14.