Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Linda Szeto Duke, M.A., CCC-SLP

Q: What is the NPI number for Linda Duke?

The National Provider Identifier (NPI) for Linda Duke is 1215152558, a Type 1 (individual) record in the CMS NPPES registry.

Speech-Language Pathologist in Willowbrook, IL · enumerated 2007.

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

National Provider Identifier

1215152558

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Registry record

Entity type Individual (Type 1)

Name Mrs. Linda Szeto Duke

Credential M.A., CCC-SLP

Sex Female

Practice address Willowbrook, IL, 60527

Phone (847) 702-9282

Enumeration date Apr 13, 2007

Last updated in NPPES Jun 29, 2016

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 146.009940 (IL) Primary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 001970 (IA) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License SP16605 (CA) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License SLP S 252 (AK) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License TSLP5152 (AZ) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License LL00004655 (WA) Secondary

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

What is the NPI number for Linda Duke?

The National Provider Identifier (NPI) for Linda Duke is 1215152558, a Type 1 (individual) record in the CMS NPPES registry.

Where does Linda Duke practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-29.