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

Katharine Laine Boyes, M.S., CCC-SLP/L

Speech-Language Pathologist in Buffalo Grove, IL · enumerated 2026.

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

National Provider Identifier

1558201673

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Registry record

Entity type Individual (Type 1)

Name Katharine Laine Boyes

Credential M.S., CCC-SLP/L

Sex Female

Practice address Buffalo Grove, IL, 60089

Phone (847) 477-1269

Enumeration date Mar 30, 2026

Last updated in NPPES Mar 30, 2026

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 146.011055 (IL) 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

Is NPI 1558201673 active?

Yes, as of the latest NPPES snapshot, NPI 1558201673 is active (record last updated 2026-03-30).

How do I verify Katharine Boyes's NPI record?

Cross-check NPI 1558201673 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-30.