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

Mrs. Mary Nan Barnes, MSP, CCC-SLP

Speech-Language Pathologist in Lexington, SC · enumerated 2010.

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

National Provider Identifier

1811214612

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Registry record

Entity type Individual (Type 1)
Name Mrs. Mary Nan Barnes
Credential MSP, CCC-SLP
Sex Female
Practice address Lexington, SC, 29072
Phone (803) 422-9774
Enumeration date May 3, 2010
Last updated in NPPES May 3, 2010

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

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 4463 (SC) Primary

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 Mary Barnes?
The National Provider Identifier (NPI) for Mary Barnes is 1811214612, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mary Barnes practice?
The practice location on file with NPPES is in Lexington, SC. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-03.