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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

GWENDOLYN LAYMAN MS CCC-SLP/L
NPI 1023669454
Speech-Language Pathologist in Oak Lawn, IL

Active since September 26, 2019
5800 W 100TH PL, OAK LAWN, IL 60453(708) 289-9142 Get Directions Write a Review

NPPES record last updated: July 14, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 14, 2026, Sep 26, 2019 (2 updates tracked since 2019).

About Gwendolyn Layman Ms Ccc-slp/l NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GWENDOLYN LAYMAN MS CCC-SLP/L (NPI 1023669454) is an individual speech-language pathologist provider in Oak Lawn, Illinois, licensed in Illinois (146.014588) and active in the NPI registry since September 2019. She maintains a secondary practice location in Palos Hills.

NPPES Registry Identity

NPI1023669454
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameGWENDOLYN LAYMANCredential: MS CCC-SLP/L
Location Address5800 W 100TH PLOak Lawn, IL 60453-3765
Mailing Address5800 W 100th PlOak Lawn, IL 60453-3765 · (708) 289-9142
Phone(708) 289-9142
Sole ProprietorYes
Enumeration DateSeptember 26, 2019
Last NPPES UpdateJuly 14, 20262 updates tracked since enumeration
NPPES CertifiedJuly 14, 2026
✔ NPI 1023669454 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers
Taxonomy Code235Z00000X
License✔ Licensed in IL · 146.014588
Definition
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.
5800 W 100TH PL, Oak Lawn, IL 60453
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Other Names 1

Former Name (1)Gwendolyn Bolhuis Ms Ccc-slp/l

Secondary Practice Location 1

Location 110125 S Roberts Rd Ste 104Palos Hills, IL 60465-1557 · Phone (708) 625-5071

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gwendolyn Layman's NPI number?

The NPI number for Gwendolyn Layman is 1023669454. It was assigned to this individual provider in the NPPES registry on September 26, 2019. The provider is also known as Gwendolyn Bolhuis Ms Ccc-Slp/L.

Where is Gwendolyn Layman located?

Gwendolyn Layman practices at 5800 W 100th Pl, Oak Lawn, IL 60453. The listed phone number is (708) 289-9142.

What is Gwendolyn Layman's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

When was this NPI record last updated?

The NPPES record for Gwendolyn Layman was last updated on July 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.