NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kirsten Nicole Jefferson, CADC

Addiction (Substance Use Disorder) Counselor in Crystal Lake, IL · enumerated 2025 · practices at Northern Illinois Recovery LLC.

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

National Provider Identifier

1588528251

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Kirsten Nicole Jefferson
Credential CADC
Sex Female
Practice address 620 N State Route 31, Crystal Lake, IL, 60012
Phone (815) 261-3450
Fax (815) 261-3451
Enumeration date Dec 16, 2025
Last updated in NPPES Dec 16, 2025

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License CADC-45326 (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

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Kirsten Jefferson?
Kirsten Jefferson is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-16.