NPIMap

Individual provider Active NPI

Claus J Fimmel, MD

  • Gastroenterology Physician
  • Northbrook, IL
National Provider Identifier
1568417780
Registry record updated Nov 19, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
036115700 Issued in IL
Practice address
40 Skokie Blvd.
Suite 110
Northbrook, IL 60062-1614
Phone
(224) 407-4400
Fax
(224) 407-2255
NPI assigned
May 24, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Nov 19, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Gastroenterology Physician 207RG0100X 13614-320 WI
Gastroenterology Physician 207RG0100X 036115700 IL Primary
Internal Medicine Physician 207R00000X 036115700 IL

Addresses

Primary practice location

40 Skokie Blvd.
Suite 110
Northbrook, IL 60062-1614

Mailing address

950 Technology Way
Suite 250
Libertyville, IL 60048-5366
Phone (224) 407-4400

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address cfimmel247492@ewd.direct.hshs.org Direct St Vincent Hospital-Hospital Sisters-Third Order of St Francis

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL, WI2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20061010000188 IL Practitioner - GastroenterologyPractitioner - Internal Medicine 3375508609 Reassigns benefits to 1 organization
I20250723004030 WI Practitioner - Gastroenterology 3375508609 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Gastroenterology
Education
Other, 1981
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

1860 Shawano Ave
Green Bay, WI 54303-2667
Phone (920) 496-4700

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
84.9 of 100Reported as group
Quality
75.91
Promoting interoperability
99
Improvement activities
40
Cost
74.6

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy1-10
Upper gastrointestinal (GI) endoscopy for acid reflux1-10

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
13614-320WIMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Comprehensive Gastrointestinal Health, LLC Gastroenterology Past Accepting new patients
Loyola University Physician Foundation Past Accepting new patients

Organizations & group practices 5

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

Hospital & facility affiliations 7

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1148428800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763510400000",
    "number": "1568417780",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "950 TECHNOLOGY WAY",
            "address_2": "SUITE 250",
            "city": "LIBERTYVILLE",
            "state": "IL",
            "postal_code": "600485366",
            "telephone_number": "224-407-4400",
            "fax_number": "224-407-2255"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "40 SKOKIE BLVD.",
            "address_2": "SUITE 110",
            "city": "NORTHBROOK",
            "state": "IL",
            "postal_code": "600621614",
            "telephone_number": "224-407-4400",
            "fax_number": "224-407-2255"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FIMMEL",
        "first_name": "CLAUS",
        "middle_name": "J",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-24",
        "last_updated": "2025-11-19",
        "certification_date": "2025-11-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "WI",
            "license": "13614-320",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "IL",
            "license": "036115700",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036115700",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "cfimmel247492@ewd.direct.hshs.org",
            "affiliation": "Y",
            "affiliationName": "St Vincent Hospital-Hospital Sisters-Third Order of St Francis",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "CDA/CCD/TXT",
            "address_1": "1860 Shawano Ave",
            "city": "Green Bay",
            "state": "WI",
            "country_code": "US",
            "postal_code": "543032667",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Northbrook, IL

Sources for this page

Verify at the official NPI Registry.