Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carol Mary Johnstone, CCC/SLP

Speech-Language Pathologist in Rock Hill, SC · enumerated 2013.

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

National Provider Identifier

1346674181

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Registry record

Entity type Individual (Type 1)

Name Carol Mary Johnstone

Credential CCC/SLP

Sex Female

Practice address 840 Annafrel St, Rock Hill, SC, 29730

Phone (803) 981-1570

Enumeration date Aug 28, 2013

Last updated in NPPES Aug 28, 2013

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 1474 (NC) Primary

SLP · Speech-Language Pathologist: A licensed clinician treating speech, language, and swallowing disorders. About the SLP credential

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

Is NPI 1346674181 active?

Yes, as of the latest NPPES snapshot, NPI 1346674181 is active (record last updated 2013-08-28).

How do I verify Carol Johnstone's NPI record?

Cross-check NPI 1346674181 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-08-28.