Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Elizabeth Duffell, SLP

Speech-Language Pathologist in Rockford, IL · enumerated 2018 · practices at Swedish American Pediatric Therapy Services.

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

National Provider Identifier

1770070328

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Registry record

Entity type Individual (Type 1)

Name Elizabeth Duffell

Credential SLP

Sex Female

Practice address 209 9th St Ste 302, Rockford, IL, 61104

Phone (779) 696-4470

Enumeration date Apr 19, 2018

Last updated in NPPES Apr 19, 2018

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 146012607 (IL) 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.

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Frequently asked questions

How do I verify Elizabeth Duffell's NPI record?

Cross-check NPI 1770070328 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1770070328 active?

Yes, as of the latest NPPES snapshot, NPI 1770070328 is active (record last updated 2018-04-19).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-19.