Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William R Kavanagh, LCSW, CADC

Addiction (Substance Use Disorder) Counselor in Oak Park, IL · enumerated 2007.

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

National Provider Identifier

1194879171

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Registry record

Entity type Individual (Type 1)

Name Mr. William R Kavanagh

Credential LCSW, CADC

Sex Male

Practice address 120 S Marion St, Oak Park, IL, 60302

Phone (708) 383-7500

Fax (708) 383-7780

Enumeration date Jan 23, 2007

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 14446 (IL) Primary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Secondary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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

Where does William Kavanagh practice?

The practice location on file with NPPES is in Oak Park, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Kavanagh?

The National Provider Identifier (NPI) for William Kavanagh is 1194879171, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.