John Erik Winterholler, MD

Primary specialty

Diagnostic Radiology PhysicianTaxonomy code 2085R0202X

License

14287656-1205 Issued in UT

Practice address

600 Highland Ave
Madison, WI 53792-0001

Phone

(608) 263-0572

NPI assigned

Apr 4, 2020

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

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in WI

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

Diagnostic Radiology

Education

Other, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mercy Health System CorporationGroup PAC ID 7416860440, shared by 14 NPIs, 749 clinicians

University of Wisconsin System Non PayrollGroup PAC ID 9133024888, 111 clinicians

Richland HospitalGroup PAC ID 7618861618, 69 clinicians

University of Wisconsin Medical Foundation IncGroup PAC ID 6608785464, 2,537 clinicians

Fort Healthcare IncGroup PAC ID 0840189718, 159 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• University of Wi Hospitals & Clinics Authority Hospital, Madison, WI, CCN 520098
• Mercy Health System Corp Hospital, Janesville, WI, CCN 520066
• Unitypoint Health - Meriter Hospital, Madison, WI, CCN 520089
• Fort Memorial Hospital Hospital, Fort Atkinson, WI, CCN 520071

Merit-based Incentive Payment System (MIPS)

Final score

96.14 of 100Reported as apm

Quality

88.29

Promoting interoperability

98.25

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://fhir-myrecord.cerner.com/r4/8F7ruIta-JA7ecm4ommy-Q50dF1FkFe4/
• Direct secure messaging: jwinterholler747190@direct.unitypoint.org
• Direct secure messaging: jwinterholler1129362@direct.uwhealth.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.

• Fort Healthcare Inc

  • Otolaryngology Physician
  • Fort Atkinson, WI
  • NPI 1417993361
  Medicare reassignment Care Compare group NPD
• Richland Hospital

  • Critical Access Hospital
  • Richland Center, WI
  • NPI 1659301273
  Medicare reassignment Care Compare group NPD
• University of Wisconsin Medical Foundation, Inc

  • Multi-Specialty Clinic/Center
  • Middleton, WI
  • NPI 1598784555
  Medicare reassignment Care Compare group NPD
• University of Wisconsin System Non Payroll

  • Multi-Specialty Clinic/Center
  • Madison, WI
  • NPI 1346266319
  Medicare reassignment Care Compare group NPD
• Group Health Cooperative of South Central Wisconsin

  • Health Maintenance Organization
  • Madison, WI
  • NPI 1245260165
  Medicare reassignment NPD
• Mercy Health System Corporation

  • Multi-Specialty Clinic/Center
  • Janesville, WI
  • NPI 1598718603
  Medicare reassignment NPD
• Mercy Health System Corporation

  • Critical Access Hospital
  • Lake Geneva, WI
  • NPI 1699728550
  Medicare reassignment NPD
• Fort Healthcare Inc

  • Rural Health Clinic/Center
  • Fort Atkinson, WI
  • NPI 1417450115
  NPD
• Mercy Health System Corporation

  • General Acute Care Hospital
  • Janesville, WI
  • NPI 1093768962
  NPD
• Richland Hospital

  • Community/Retail Pharmacy
  • Richland Center, WI
  • NPI 1558127480
  NPD
• Richland Hospital

  • Rural Health Clinic/Center
  • Spring Green, WI
  • NPI 1952094138
  NPD
• University of Wisconsin Medical Foundation, Inc

  • Health Educator
  • Madison, WI
  • NPI 1487414082
  NPD

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

• Fort Healthcare Inc

  • Otolaryngology Physician
  • Fort Atkinson, WI
  • NPI 1417993361

  Hospital

  Care Compare affiliation
• Fort Healthcare, Inc.

  • General Acute Care Hospital
  • Fort Atkinson, WI
  • NPI 1811916281
  Care Compare affiliation
• Mercy Health System Corporation

  • General Acute Care Hospital
  • Janesville, WI
  • NPI 1093768962
  Care Compare affiliation
• Meriter Hospital, Inc.

  • Rehabilitation Clinic/Center
  • Madison, WI
  • NPI 1073672556

  Hospital

  Care Compare affiliation
• Meriter Hospital, Inc.

  • General Acute Care Hospital
  • Madison, WI
  • NPI 1114920048
  Care Compare affiliation
• University of Wisconsin Hospitals and Clinics Authority

  • General Acute Care Hospital
  • Madison, WI
  • NPI 1922043744
  Care Compare affiliation

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

{
    "created_epoch": "1585958400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1780358400000",
    "number": "1912536640",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "600 HIGHLAND AVE",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537920001"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "600 HIGHLAND AVE",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537920001",
            "telephone_number": "608-263-0572"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "5295 S Commerce Dr Ste 550",
            "address_purpose": "LOCATION",
            "city": "Murray",
            "state": "UT",
            "postal_code": "841074736",
            "country_code": "US",
            "telephone_number": "801-313-4110",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1000 Mineral Point Ave",
            "address_purpose": "LOCATION",
            "city": "Janesville",
            "state": "WI",
            "postal_code": "535482982",
            "country_code": "US",
            "telephone_number": "608-756-6868",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WINTERHOLLER",
        "first_name": "JOHN",
        "middle_name": "ERIK",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-04-04",
        "last_updated": "2026-06-02",
        "certification_date": "2026-06-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0204X",
            "taxonomy_group": "",
            "desc": "Radiology, Vascular & Interventional Radiology",
            "state": "WI",
            "license": "77763",
            "primary": false
        },
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "WI",
            "license": "77763",
            "primary": false
        },
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "UT",
            "license": "14287656-1205",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "jwinterholler1129362@direct.uwhealth.org",
            "affiliation": "N",
            "address_1": "600 Highland Ave",
            "city": "Madison",
            "state": "WI",
            "country_code": "US",
            "postal_code": "537920001",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "CONNECT",
            "endpointTypeDescription": "CONNECT URL",
            "endpoint": "https://esmd.officeally.io:8291/Gateway/DocumentSubmission/2_0/NhinService/XDRRequest_Service",
            "affiliation": "Y",
            "endpointDescription": "2.16.840.1.113883.3.2019.3",
            "affiliationName": "Bluemark LLC/ Office Ally",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "CMS esMD eMDR",
            "address_1": "1300 SE Cardinal Ct Ste 190",
            "city": "Vancouver",
            "state": "WA",
            "country_code": "US",
            "postal_code": "986839683",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Sara Margaret Winkler, O.D.
• Stacey Danielle Winkler, M.S.
• Emily R Winslow, M.D.
• Elizabeth H Winston, PH.D.
• Emily Clare Winter
• John Francis Winters, PHARM D.
• Andrew Patrick Winterstein, PHD, LAT
• Laura Wintheiser, MSW, APSW
• Annette Cynthia Winzenried, R.N
• Charity Annelien Wip, MD

• Diagnostic Radiology Physician in Madison, WI
• Providers in Madison, WI by specialty
• Diagnostic Radiology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 2, 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.