Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Courtney Layne Clark

Registered Nurse in Marion, IL · enumerated 2023.

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

National Provider Identifier

1336852508

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Registry record

Entity type Individual (Type 1)

Name Courtney Layne Clark

Sex Female

Practice address 9210 Neber Rd, Marion, IL, 62959

Phone (618) 771-2524

Enumeration date Jan 3, 2023

Last updated in NPPES Jan 3, 2023

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 041455068 (IL) 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 Courtney Clark's NPI record?

Cross-check NPI 1336852508 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1336852508 active?

Yes, as of the latest NPPES snapshot, NPI 1336852508 is active (record last updated 2023-01-03).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-03.