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

Dr. Larrie Ann Williamson, M.D.

Psychiatry Physician in Shreveport, LA · enumerated 2006.

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

National Provider Identifier

1356319453

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Registry record

Entity type Individual (Type 1)

Name Dr. Larrie Ann Williamson

Credential M.D.

Sex Female

Practice address Shreveport, LA, 71101

Phone (318) 675-1300

Fax (318) 675-1301

Enumeration date Mar 14, 2006

Last updated in NPPES Jan 29, 2020

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 023926 (LA) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License MD.023926 (LA) Primary

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
1487562	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Larrie Williamson practice?

The practice location on file with NPPES is in Shreveport, LA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Larrie Williamson?

The National Provider Identifier (NPI) for Larrie Williamson is 1356319453, 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 2020-01-29.