Onsite Diagnostic Labs Inc

Primary specialty

Clinical Medical LaboratoryTaxonomy code 291U00000X

Legal business name

ONSITE DIAGNOSTIC LABS INC

Practice address

2521 Gross Point Rd Ste 1B
Evanston, IL 60201-4993

Phone

(847) 530-4994

NPI assigned

Jul 22, 2021

Organization subpart

No

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

Authorized official

Name

Stephan Erdelyi

Title

President

Phone

(847) 530-4994

Specialties & licenses 1

Addresses

Other names 1

• Onsite Lab Corp Former legal business name

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in IL

Enrollment records 1

Locations

Interoperability endpoints

• Direct secure messaging: results@onsitehealthmanager.com

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

{
    "created_epoch": "1626912000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1772409600000",
    "number": "1346813797",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2521 GROSS POINT RD STE 1B",
            "city": "EVANSTON",
            "state": "IL",
            "postal_code": "602014993",
            "telephone_number": "847-530-4994"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2521 GROSS POINT RD STE 1B",
            "city": "EVANSTON",
            "state": "IL",
            "postal_code": "602014993",
            "telephone_number": "847-530-4994"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "ONSITE DIAGNOSTIC LABS INC",
        "organizational_subpart": "NO",
        "enumeration_date": "2021-07-22",
        "last_updated": "2026-03-02",
        "certification_date": "2026-03-02",
        "status": "A",
        "authorized_official_last_name": "ERDELYI",
        "authorized_official_first_name": "STEPHAN",
        "authorized_official_title_or_position": "PRESIDENT",
        "authorized_official_telephone_number": "847-530-4994"
    },
    "taxonomies": [
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "Results@OnSitehealthmanager.com",
            "affiliation": "N",
            "address_1": "2521 Gross Point Rd Ste 1B",
            "city": "Evanston",
            "state": "IL",
            "country_code": "US",
            "postal_code": "602014993",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "organization_name": "Onsite Lab Corp",
            "code": "4",
            "type": "Former Legal Business Name"
        }
    ]
}

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• Anita Kantilal-Patel Opdycke, NP-C
• Open Studio Project, Inc.
• Lara Ann Oppenheimer, LCPC
• Optimal Life Healthcare

• Clinical Medical Laboratory in Evanston, IL
• Providers in Evanston, IL by specialty
• Clinical Medical Laboratory in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 2, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.