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OLIVIA CECILE HARNOIS MS CCC-SLP
NPI 1992558340
Speech-Language Pathologist in Johns Island, SC

Active since April 08, 2024
60 FENWICK HALL ALY APT 825, JOHNS ISLAND, SC 29455(603) 489-7059 Get Directions Write a Review

NPPES record last updated: June 8, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Olivia Cecile Harnois Ms Ccc-slp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

OLIVIA CECILE HARNOIS MS CCC-SLP (NPI 1992558340) is an individual speech-language pathologist provider in Johns Island, South Carolina, licensed in North Carolina (30004940) and active in the NPI registry since April 2024. She is a graduate of Other (2021).

NPPES Registry Identity

NPI1992558340
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameOLIVIA CECILE HARNOISCredential: MS CCC-SLP
Location Address60 FENWICK HALL ALY APT 825Johns Island, SC 29455-3135
Mailing Address60 Fenwick Hall Aly Apt 825Johns Island, SC 29455-3135 · (603) 489-7059
Phone(603) 489-7059
Sole ProprietorYes
Medical School CMSOtherGraduated 2021
Enumeration DateApril 8, 2024
Last NPPES UpdateJune 8, 2026
NPPES CertifiedJune 8, 2026
✔ NPI 1992558340 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers
Taxonomy Code235Z00000X
Licenses✔ Licensed in NC · 30004940✔ Licensed in SC · 7692
Definition
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.
60 FENWICK HALL ALY APT 825, Johns Island, SC 29455
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of NC.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Olivia Cecile Harnois Ms Ccc-slp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID4587133673
PECOS Enrollment IDI20260519000854

Medicare Billing Reassignments

2

Medicare enrollment records show Olivia Harnois reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Expressable Therapy PC
1,054 mi
Speech-Language Pathologist
7600 CHEVY CHASE DR, BLDG 2 SUITE 300
Austin, TX 78752
  • Reassigned Medicare billing, South Carolina enrollment
  • 21 clinicians in this Medicare group
NPI 1134875370 (512) 377-6318
Expressable Speech-Language Pathology, P.C.
1,057 mi
Speech-Language Pathologist
3800 N LAMAR BLVD STE 200
Austin, TX 78756
  • Reassigned Medicare billing, North Carolina enrollment
  • Medicare enrollment name: Expressable Speech-Language Pathology PC
  • 121 clinicians in this Medicare group
NPI 1649875857 (512) 377-6318

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Olivia Harnois's NPI number?

The NPI number for Olivia Harnois is 1992558340. It was assigned to this individual provider in the NPPES registry on April 8, 2024.

Where is Olivia Harnois located?

Olivia Harnois practices at 60 Fenwick Hall Aly Apt 825, Johns Island, SC 29455. The listed phone number is (603) 489-7059.

What is Olivia Harnois's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

Is Olivia Harnois enrolled in Medicare?

Yes. Olivia Harnois is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Olivia Harnois's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Olivia Harnois reassigns Medicare benefits to 2 organizations: Expressable Therapy PC (Austin, TX) and Expressable Speech-Language Pathology, P.C. (Austin, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Olivia Harnois's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Olivia Harnois accept?

Health plans from Blue Cross and Blue Shield of NC list Olivia Harnois as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Olivia Harnois was last updated on June 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.