Marilyn B Omahen, L.C.S.W., R.D.D.P.

Primary specialty

Addiction (Substance Use Disorder) CounselorTaxonomy code 101YA0400X

License

25616 Issued in IL

Practice address

456 W Frontage Rd Ste 2
Northfield, IL 60093-3038

Phone

(847) 446-0448

NPI assigned

Nov 16, 2006

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

State licenses

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

{
    "created_epoch": "1163635200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1114090040",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1923 NEW WILLOW RD APT 6",
            "city": "NORTHFIELD",
            "state": "IL",
            "postal_code": "600932944",
            "telephone_number": "847-446-0448"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "456 W FRONTAGE RD STE 2",
            "city": "NORTHFIELD",
            "state": "IL",
            "postal_code": "600933038",
            "telephone_number": "847-446-0448"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OMAHEN",
        "first_name": "MARILYN",
        "middle_name": "B",
        "name_prefix": "Ms.",
        "credential": "L.C.S.W., R.D.D.P.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2006-11-16",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YA0400X",
            "taxonomy_group": "",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": "IL",
            "license": "25616",
            "primary": true
        },
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "IL",
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Addiction (Substance Use Disorder) Counselor in Northfield, IL
• Providers in Northfield, IL by specialty
• Addiction (Substance Use Disorder) Counselor in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; 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.