John Michael Sullivan, MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

81236 Issued in CT

Practice address

251 E Huron St
Chicago, IL 60611-2908

Phone

(312) 926-2000

NPI assigned

Mar 25, 2021

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Medicare fee-for-service enrollment

Enrolled in IL, CT, MA3 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 3

Specialty

Emergency Medicine

Education

Other, 2021

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Hospital & facility affiliations

• St Francis Hospital & Medical Center Hospital, Hartford, CT, CCN 070002

Merit-based Incentive Payment System (MIPS)

Final score

93.41 of 100Reported as group

Quality

86.81

Improvement activities

40

Cost

77.34

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jsullivan4426961@direct.trinity-health.org

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.

• Cepamerica Illinois LLP

  • Emergency Medicine Physician
  • Elgin, IL
  • NPI 1912283110
  Medicare reassignment NPD
• Hartford Healthcare Medical Group Specialists, PLLC

  • Surgery Physician
  • Hartford, CT
  • NPI 1023584216
  Medicare reassignment NPD
• Hartford Hospital

  • Surgery Physician
  • Hartford, CT
  • NPI 1407806391

  Emergency Medicine

  Medicare reassignment NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Waterbury, CT
  • NPI 1700681202
  Medicare reassignment
• Vituity-Massachusetts PLLC

  • Emergency Medicine Physician
  • Springfield, MA
  • NPI 1083404313
  Medicare reassignment
• Cepamerica Illinois LLP

  • Emergency Medicine Physician
  • Bloomington, IL
  • NPI 1497435242
  NPD
• Cepamerica Illinois LLP

  • Emergency Medicine Physician
  • Springfield, IL
  • NPI 1871360297
  NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Stafford Springs, CT
  • NPI 1427853936
  NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Fort Lauderdale, FL
  • NPI 1700747946
  NPD
• Hartford Healthcare Medical Group Specialists LLC

  • Customized Equipment (DME)
  • Groton, CT
  • NPI 1295367068
  NPD
• Hartford Hospital

  • General Acute Care Hospital
  • Hartford, CT
  • NPI 1770696643
  NPD

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

• Saint Francis Hospital and Medical Center

  • Psychiatric Hospital Unit
  • Hartford, CT
  • NPI 1144234428
  Care Compare affiliation
• Saint Francis Hospital and Medical Center

  • General Acute Care Hospital
  • Hartford, CT
  • NPI 1407833486
  Care Compare affiliation
• Saint Francis Hospital and Medical Center

  • General Acute Care Hospital
  • Hartford, CT
  • NPI 1871713495
  Care Compare affiliation

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

{
    "created_epoch": "1616630400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774310400000",
    "number": "1922685916",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "251 E HURON ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606112908",
            "telephone_number": "312-926-2000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "251 E HURON ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606112908",
            "telephone_number": "312-926-2000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2800 Main St",
            "address_purpose": "LOCATION",
            "city": "Bridgeport",
            "state": "CT",
            "postal_code": "066064292",
            "country_code": "US",
            "telephone_number": "475-210-5604",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "80 Seymour St",
            "address_purpose": "LOCATION",
            "city": "Hartford",
            "state": "CT",
            "postal_code": "061028000",
            "country_code": "US",
            "telephone_number": "860-972-0001",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SULLIVAN",
        "first_name": "JOHN",
        "middle_name": "MICHAEL",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-03-25",
        "last_updated": "2026-03-24",
        "certification_date": "2026-03-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "IL",
            "license": "1922685916",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "MA",
            "license": "1025775",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CT",
            "license": "81236",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• James Francis Sullivan, MD
• Jared John Sullivan
• Jill Elizabeth Sullivan, PH.D.
• Jillian Margaret B Sullivan, PT
• John Sullivan, MD
• Julie A Sullivan
• Karen Sullivan
• Kari A Sullivan
• Katherine Ann Sullivan, APRN, FNP-BC
• Kathryn Hope Sullivan, MA, CADC

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 24, 2026; 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.