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

Olivia Cecile Harnois, MS CCC-SLP

Speech-Language Pathologist in Johns Island, SC · enumerated 2024.

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

National Provider Identifier

1992558340

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Registry record

Entity type Individual (Type 1)

Name Olivia Cecile Harnois

Credential MS CCC-SLP

Sex Female

Practice address Johns Island, SC, 29455

Phone (603) 489-7059

Enumeration date Apr 8, 2024

Last updated in NPPES Jun 8, 2026

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 7692 (SC) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 30004940 (NC) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Olivia Harnois's NPI record?

Cross-check NPI 1992558340 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1992558340 active?

Yes, as of the latest NPPES snapshot, NPI 1992558340 is active (record last updated 2026-06-08).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-08.