Scot Carson Callahan Jr., MD, PHD

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

83003 Issued in WI

Practice address

749 University Row Ste 200
Madison, WI 53705-1465

Phone

(608) 263-6400

NPI assigned

Apr 3, 2022

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in WI, IL2 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

Radiation Oncology

Education

Other, 2022

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: scallahan890608@direct.unitypoint.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.

• Mercy Health System Corporation

  • Multi-Specialty Clinic/Center
  • Janesville, WI
  • NPI 1598718603
  Medicare reassignment NPD
• Rockford Health Physicians

  • Multi-Specialty Clinic/Center
  • Rockford, IL
  • NPI 1043242886
  Medicare reassignment NPD
• Mercy Health System Corporation

  • Critical Access Hospital
  • Lake Geneva, WI
  • NPI 1699728550
  NPD
• St Luke'S Methodist Hospital

  • General Acute Care Hospital
  • Cedar Rapids, IA
  • NPI 1083708226
  NPD

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

{
    "created_epoch": "1648944000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1754265600000",
    "number": "1700527959",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "749 UNIVERSITY ROW STE 200",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537051465"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "749 UNIVERSITY ROW STE 200",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537051465",
            "telephone_number": "608-263-6400"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CALLAHAN",
        "first_name": "SCOT",
        "middle_name": "CARSON",
        "name_suffix": "Jr.",
        "credential": "MD, PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-04-03",
        "last_updated": "2025-08-04",
        "certification_date": "2025-08-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "WI",
            "license": "83003",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Gloria Call, PHARMD
• Jane E Call, OTR
• Caitlin Callaghan
• Amy Callahan, MSSW LCSW
• Natalie Callahan
• Natalie S Callander, MD
• Elizabeth Calle, MD, PHD
• Anthony Jay Callisto, MD
• Jessica R Callisto, PA-C
• Casey R Calvert, MSOP, CPO

• Radiation Oncology Physician in Madison, WI
• Providers in Madison, WI by specialty
• Radiation Oncology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 4, 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.