Gwendolyn Layman, MS CCC-SLP/L

Primary specialty

Speech-Language PathologistTaxonomy code 235Z00000X

License

146.014588 Issued in IL

Practice address

5800 W 100TH PL
Oak Lawn, IL 60453-3765

Phone

(708) 289-9142

NPI assigned

Sep 26, 2019

Sex

Female

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other names 1

• Gwendolyn Bolhuis Former name

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Master of Science

State licenses

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1569456000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783987200000",
    "number": "1023669454",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5800 W 100TH PL",
            "city": "OAK LAWN",
            "state": "IL",
            "postal_code": "604533765",
            "telephone_number": "708-289-9142"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5800 W 100TH PL",
            "city": "OAK LAWN",
            "state": "IL",
            "postal_code": "604533765",
            "telephone_number": "708-289-9142"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "10125 S Roberts Rd Ste 104",
            "address_purpose": "LOCATION",
            "city": "Palos Hills",
            "state": "IL",
            "postal_code": "604651557",
            "country_code": "US",
            "telephone_number": "708-625-5071",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LAYMAN",
        "first_name": "GWENDOLYN",
        "credential": "MS CCC-SLP/L",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2019-09-26",
        "last_updated": "2026-07-14",
        "certification_date": "2026-07-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "235Z00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Speech-Language Pathologist",
            "state": "IL",
            "license": "146.014588",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "GWENDOLYN",
            "last_name": "BOLHUIS",
            "credential": "MS CCC-SLP/L",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

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• Speech-Language Pathologist in Oak Lawn, IL
• Providers in Oak Lawn, IL by specialty
• Speech-Language Pathologist in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 14, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.