Jack Weston Fitzsimons, MD

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

036.170810 Issued in IL

Practice address

315 W Carpenter St
Springfield, IL 62702-4901

Phone

(217) 545-8000

NPI assigned

Mar 27, 2021

Last updated

Dec 19, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in IL

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 1

Specialty

Internal Medicine

Education

Other, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cep America-Illinois Hospitalists, LLPGroup PAC ID 3274765904, 193 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Memorial Medical Center Hospital, Springfield, IL, CCN 140148
• St Johns Hospital Hospital, Springfield, IL, CCN 140053
• St Francis Hospital Hospital, Litchfield, IL, CCN 141350

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jackfitzsimons@siusm.allscriptsdirect.net
• Direct secure messaging: jfitzsimons139828@direct.luhs.org

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

• Cep America-Illinois Hospitalists, LLP

  • Internal Medicine Physician
  • Belleville, IL
  • NPI 1841613403
  Medicare reassignment Care Compare group
• Board of Trustees of Southern Illinois University

  dba Carbondale Care A Van

  • Rural Health Clinic/Center
  • Carbondale, IL
  • NPI 1215978127
  NPD
• Loyola University Medical Center

  dba Foster G. McGaw Hospital

  • General Acute Care Hospital
  • Maywood, IL
  • NPI 1376521575
  NPD

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

• Memorial Medical Center

  • General Acute Care Hospital
  • Springfield, IL
  • NPI 1255317590
  Care Compare affiliation
• St Francis Hospital of the Hospital Sisters of the Third Order of St F

  • Critical Access Hospital
  • Litchfield, IL
  • NPI 1326057076
  Care Compare affiliation
• St Johns Hospital of the Hospital Sisters of the Third Order of St F

  dba HSHS St. John's Hospital

  • General Acute Care Hospital
  • Springfield, IL
  • NPI 1205818481
  Care Compare affiliation

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

{
    "created_epoch": "1616803200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1766102400000",
    "number": "1558948273",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "315 W CARPENTER ST",
            "city": "SPRINGFIELD",
            "state": "IL",
            "postal_code": "627024901",
            "telephone_number": "217-545-8000",
            "fax_number": "217-545-1141"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "315 W CARPENTER ST",
            "city": "SPRINGFIELD",
            "state": "IL",
            "postal_code": "627024901",
            "telephone_number": "217-545-8000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FITZSIMONS",
        "first_name": "JACK",
        "middle_name": "WESTON",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-03-27",
        "last_updated": "2025-12-19",
        "certification_date": "2025-12-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "IL",
            "license": "036.170810",
            "primary": true
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "125.078448",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Liam James Fischer, D.O.
• Kelli C. Fisher, FNP
• John R Fisk, M.D.
• Michael Fitz
• Hayley Fitzpatrick
• Five Star Rehabilitation and Wellness Services LLC (Ageility Physical Therapy Solutions at Brenden Gardens)
• John Mark Flack, MD, MPH
• Shelly Flagg, FNP-BC
• Vincent James Flammini, MSW, LCSW
• Dana K Flatley, CRNA

• Hematology & Oncology Physician in Springfield, IL
• Providers in Springfield, IL by specialty
• Hematology & Oncology Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 19, 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.