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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MACKENZIE GASS MS CCC-SLP
NPI 1306354162
Speech-Language Pathologist in Belleville, IL

Active since January 15, 2018
1400 N CHARLES ST, BELLEVILLE, IL 62221(618) 233-3798 Get Directions Write a Review

NPPES record last updated: August 14, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Aug 14, 2026, Aug 29, 2022, Aug 18, 2021 and 1 more (4 updates tracked since 2018).

About Mackenzie Gass Ms Ccc-slp NPPES

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

MACKENZIE GASS MS CCC-SLP (NPI 1306354162) is an individual speech-language pathologist provider in Belleville, Illinois, licensed in Illinois (242006252) and active in the NPI registry since January 2018.

NPPES Registry Identity

NPI1306354162
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameMACKENZIE GASSCredential: MS CCC-SLP
Location Address1400 N CHARLES STBelleville, IL 62221-4858
Mailing Address1400 N Charles StBelleville, IL 62221-4858
Phone(618) 233-3798
Sole ProprietorNo
Enumeration DateJanuary 15, 2018
Last NPPES UpdateAugust 14, 20264 updates tracked since enumeration
NPPES CertifiedAugust 14, 2026
✔ NPI 1306354162 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 · 242006252
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.
1400 N CHARLES ST, Belleville, IL 62221
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Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. KELSEY HIBBELER
Speech-Language Pathologist
1400 N CHARLES ST
BELLEVILLE, IL 62221
St. Clair County (618) 233-3798
BROOKE ASHLYNN BARTLING
Speech-Language Pathologist
1400 N CHARLES ST
BELLEVILLE, IL 62221
St. Clair County (618) 233-3798
MARLAINA FELICE REEL
Registered Nurse (School)
1400 N CHARLES ST
BELLEVILLE, IL 62221
St. Clair County (618) 660-6505
KAYLA HUELS
Speech-Language Pathologist
1400 N CHARLES ST
BELLEVILLE, IL 62221
St. Clair County (618) 233-3798
OLIVIA R FIEDLER
Speech-Language Pathologist
1400 N CHARLES ST
BELLEVILLE, IL 62221
St. Clair County (618) 233-3798

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 Mackenzie Gass's NPI number?

The NPI number for Mackenzie Gass is 1306354162. It was assigned to this individual provider in the NPPES registry on January 15, 2018.

Where is Mackenzie Gass located?

Mackenzie Gass practices at 1400 N Charles St, Belleville, IL 62221. The listed phone number is (618) 233-3798.

What is Mackenzie Gass'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 Mackenzie Gass was last updated on August 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.