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

Mrs. Heather L O'Neill, M.S., CCC-SLP

Speech-Language Pathologist in Jefferson, WI · enumerated 2012.

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

National Provider Identifier

1801157540

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Registry record

Entity type Individual (Type 1)

Name Mrs. Heather L O'Neill

Credential M.S., CCC-SLP

Sex Female

Practice address Jefferson, WI, 53549

Phone (920) 222-9506

Enumeration date May 30, 2012

Last updated in NPPES May 30, 2012

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 3642-154 (WI) 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

What is the NPI number for Heather O'Neill?

The National Provider Identifier (NPI) for Heather O'Neill is 1801157540, a Type 1 (individual) record in the CMS NPPES registry.

Where does Heather O'Neill practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-05-30.