R. Sundaresan, MD, SC

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

Legal business name

R. SUNDARESAN, MD, SC

Practice address

3000 N Halsted St
Room 607
Chicago, IL 60657-5188

Phone

(773) 296-3456

Fax

(773) 296-3622

NPI assigned

Mar 22, 2006

Organization subpart

No

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

Authorized official

Name

Dr. Ramamoorthy Sundaresan, M.D.

Title

Physician Owner

Phone

(630) 718-0200

Specialties & licenses 2

Addresses

Other identifiers 1

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

{
    "created_epoch": "1142985600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1757548800000",
    "number": "1427017961",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1730 PARK ST",
            "address_2": "SUITE 101",
            "city": "NAPERVILLE",
            "state": "IL",
            "postal_code": "605632688",
            "telephone_number": "630-718-0200",
            "fax_number": "630-718-0900"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3000 N HALSTED ST",
            "address_2": "ROOM 607",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606575188",
            "telephone_number": "773-296-3456",
            "fax_number": "773-296-3622"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "R. SUNDARESAN, MD, SC",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-03-22",
        "last_updated": "2025-09-11",
        "status": "A",
        "authorized_official_last_name": "SUNDARESAN",
        "authorized_official_first_name": "RAMAMOORTHY",
        "authorized_official_title_or_position": "PHYSICIAN OWNER",
        "authorized_official_telephone_number": "630-718-0200",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "M.D."
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "IL",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS / BLUE SHIELD",
            "identifier": "01620377",
            "state": "IL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

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• Gastroenterology Physician in Chicago, IL
• Providers in Chicago, IL by specialty
• Gastroenterology Physician 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.