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

Heidi Cornwell

Speech-Language Pathologist in Washington, IL · enumerated 2017 · practices at Central Columbia Grade Sch 51.

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

National Provider Identifier

1508384504

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Registry record

Entity type Individual (Type 1)

Name Heidi Cornwell

Sex Female

Practice address Washington, IL, 61571

Phone (309) 444-3943

Enumeration date Aug 30, 2017

Last updated in NPPES Aug 30, 2017

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 146005352 (IL) Primary

Other identifiers

Identifier	Type	State	Issuer
146005352	Other	IL	IDFPR

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 Heidi Cornwell?

The National Provider Identifier (NPI) for Heidi Cornwell is 1508384504, a Type 1 (individual) record in the CMS NPPES registry.

Where does Heidi Cornwell practice?

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

Other providers at this practice address

Browse all →

Central Columbia Grade Sch 51 Local Education Agency (LEA) · Washington, IL NPI 1124297106 Kristin Hill School Psychologist · Washington, IL NPI 1760345532

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-08-30.