James J. Herdegen, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

036078423 Issued in IL

Practice address

1740 W Taylor St
Chicago, IL 60612-7232

Phone

(866) 600-2273

NPI assigned

Aug 16, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 5

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in IL, WI2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Pulmonary DiseaseAlso: Critical Care (Intensivists)

Education

University of Chicago, Pritzker School of Medicine, 1986

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Rush University Medical GroupGroup PAC ID 5496658874, 1,521 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Rush University Medical Center Hospital, Chicago, IL, CCN 140119
• Rush Oak Park Hospital Hospital, Oak Park, IL, CCN 140063

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jherdegen20081@cghmc.direct-ci.com
• Direct secure messaging: jherdegen237658@direct.myadvocateaurora.org
• Direct secure messaging: jherdegen1878@direct.rush.rush-health.com

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.

• Rush University Medical Group

  dba Rush University Internists

  • Internal Medicine Physician
  • Chicago, IL
  • NPI 1093819542
  Medicare reassignment Care Compare group NPD
• Advocate Health and Hospitals Corporation

  dba Advocate Medical Group

  • Multi-Specialty Clinic/Center
  • Oak Brook, IL
  • NPI 1700824455
  Medicare reassignment NPD
• The Board of Trustees of the University of Illinois

  • Anatomic Pathology Physician
  • Chicago, IL
  • NPI 1386863819
  Medicare reassignment NPD
• Aurora Medical Group, Inc.

  • Certified Registered Nurse Anesthetist
  • Milwaukee, WI
  • NPI 1427271378

  Internal Medicine

  Medicare reassignment NPD
• Advocate Health and Hospitals Corporation

  dba Advocate Children's Hospital

  • Children's Hospital
  • Oak Lawn, IL
  • NPI 1508315516
  NPD
• Advocate Health and Hospitals Corporation

  dba Advocate Good Samaritan Hospital

  • General Acute Care Hospital
  • Downers Grove, IL
  • NPI 1578670543
  NPD
• Rush University Medical Center

  dba Rush Oak Brook

  • Internal Medicine Physician
  • Oak Brook, IL
  • NPI 1801375696
  NPD
• The Board of Trustees of the University of Illinois

  dba Occupational Health Service Institute (OHSI)

  • Occupational Medicine Physician
  • Chicago, IL
  • NPI 1043727571
  NPD
• The Board of Trustees of the University of Illinois

  • Internal Medicine Physician
  • Chicago, IL
  • NPI 1609094739
  NPD
• Aurora Medical Group, Inc.

  • Durable Medical Equipment & Medical Supplies
  • Oshkosh, WI
  • NPI 1326858044
  NPD

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

• Rush Oak Park Hospital Inc

  • General Acute Care Hospital
  • Oak Park, IL
  • NPI 1558391706
  Care Compare affiliation
• Rush University Medical Center

  • Children's Hospital
  • Chicago, IL
  • NPI 1801908728
  Care Compare affiliation
• Rush University Medical Center

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1932213600
  Care Compare affiliation

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

{
    "created_epoch": "1155686400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753747200000",
    "number": "1184737793",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "840 S WOOD ST",
            "address_2": "806 CSB, MC 719",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606124325",
            "telephone_number": "312-413-9036",
            "fax_number": "312-996-4665"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1740 W TAYLOR ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606127232",
            "telephone_number": "866-600-2273"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "14555 W National Ave",
            "address_purpose": "LOCATION",
            "city": "New Berlin",
            "state": "WI",
            "postal_code": "531514494",
            "country_code": "US",
            "telephone_number": "844-284-0381",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "9555 S 52nd Ave",
            "address_purpose": "LOCATION",
            "city": "Oak Lawn",
            "state": "IL",
            "postal_code": "604533054",
            "country_code": "US",
            "telephone_number": "708-634-0950",
            "fax_number": "708-634-0942",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HERDEGEN",
        "first_name": "JAMES",
        "middle_name": "J.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-08-16",
        "last_updated": "2025-07-29",
        "certification_date": "2025-07-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "WI",
            "license": "75092",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036078423",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS PROVIDER #",
            "identifier": "0040154978",
            "state": "IL"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS PROVIDER #",
            "identifier": "0081644641",
            "state": "IL"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS PROVIDER #",
            "identifier": "0001633166",
            "state": "IL"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1003255818",
            "state": "WI"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS PROVIDER #",
            "identifier": "0021647388",
            "state": "IL"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "9555 S 52nd Ave",
            "city": "Oak Lawn",
            "state": "IL",
            "country_code": "US",
            "postal_code": "604533054",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "jherdegen237658@direct.myadvocateaurora.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "9555 S 52nd Ave",
            "city": "Oak Lawn",
            "state": "IL",
            "country_code": "US",
            "postal_code": "604533054",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Leyla Rose Herbst
• Meredith Herbst
• Paula Herbst
• Jacqueline Herbstman, LCSW
• Elizabeth Hercher
• Kristen Herdegen
• Here Now Counseling Services, PLLC
• Araceli Heredia, CRC, LCPC
• Kenia Heredia
• Linda Heredia, LPC

• Internal Medicine Physician in Chicago, IL
• Providers in Chicago, IL by specialty
• Internal Medicine Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 29, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.