Sigma Diagnostics Inc

Primary specialty

Clinic/CenterTaxonomy code 261Q00000X

Legal business name

SIGMA DIAGNOSTICS INC

Practice address

2333 Wisconsin Ave # 6
Downers Grove, IL 60515-4022

Phone

(346) 771-1189

NPI assigned

Oct 1, 2026

Last updated

Oct 1, 2026By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Baig Mohammed Sayeed

Title

Clinic/Center

Phone

(346) 771-1189

Specialties & licenses 2

Addresses

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

{
    "created_epoch": "1790812800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1790812800000",
    "number": "1063326387",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2333 WISCONSIN AVE # 6",
            "city": "DOWNERS GROVE",
            "state": "IL",
            "postal_code": "605154022",
            "telephone_number": "346-771-1189"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2333 WISCONSIN AVE # 6",
            "city": "DOWNERS GROVE",
            "state": "IL",
            "postal_code": "605154022",
            "telephone_number": "346-771-1189"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "SIGMA DIAGNOSTICS INC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-10-01",
        "last_updated": "2026-10-01",
        "certification_date": "2026-10-01",
        "status": "A",
        "authorized_official_last_name": "MOHAMMED SAYEED",
        "authorized_official_first_name": "BAIG",
        "authorized_official_title_or_position": "CLINIC/CENTER",
        "authorized_official_telephone_number": "346-771-1189"
    },
    "taxonomies": [
        {
            "code": "261Q00000X",
            "taxonomy_group": "",
            "desc": "Clinic/Center",
            "state": "NU",
            "license": null,
            "primary": true
        },
        {
            "code": "261QP2300X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Primary Care",
            "state": "NU",
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mohammad Tabraize Siddique, M. D.
• Kelly Jean Sieczkowski, IBCLC, LPC
• Peggy Siegele, APN
• Miranda Nicole Siemsen
• Jeanine Elaine Sienkowski, APN
• Emily Silverman
• Jessica Sime, MD
• Diana Lynn Simmons, FNP
• Gayle M Simmons, MD
• Susan Mary Simnick, PT

• Clinic/Center in Downers Grove, IL
• Providers in Downers Grove, IL by specialty
• Clinic/Center in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 1, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.