Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Bys Speech and Occupational Therapy Services, LLC

Speech-Language Pathologist in Darien, IL · enumerated 2017 · authorized official Matthew Sullivan, Chief Financial Officer.

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

National Provider Identifier

1316459183

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Registry record

Entity type Organization (Type 2)

Legal business name Bys Speech and Occupational Therapy Services, LLC

Parent organization By Your Side, LLC

Practice address 8201 Cass Ave, Darien, IL, 60561

Phone (630) 590-5571

Fax (630) 326-7175

Enumeration date Nov 1, 2017

Last updated in NPPES Mar 8, 2021

Taxonomy & classification

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers Primary

Authorized official

Name Matthew Sullivan

Title Chief Financial Officer

Phone (630) 590-5571

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

Who is the authorized official for Bys Speech and Occupational Therapy Services, LLC?

NPPES lists Matthew Sullivan (Chief Financial Officer) as the authorized official for this organization.

What is the NPI number for Bys Speech and Occupational Therapy Services, LLC?

The NPI for Bys Speech and Occupational Therapy Services, LLC is 1316459183, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-08.