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WI · HHS OCR reports

HIPAA breaches in Wisconsin

HIPAA breaches affecting 500 or more individuals reported to HHS OCR by covered entities listed in Wisconsin.

Reports

126

Individuals affected

12,717,130

Under investigation

12

Top type: Hacking/IT Incident

State breach notification law

Wis. Stat. § 134.98 (Trade Regulations - Notice of Unauthorized Acquisition of Personal Information) (amended 2007)

Timing: 45 days Wisconsin requires entities (including businesses) to notify affected individuals within a

Read the Wisconsin data breach notification law summary

All reports, newest first

Page 1 of 3. 126 reports.

HIPAA breach reports from the HHS OCR Breach Portal
Covered entityEntity typeIndividualsSubmittedType of breachStatus
Health Payment Systems, Inc.Business Associate9,380Jul 10, 2026Hacking/IT IncidentUnder investigation
T.A. Solberg Co., IncHealthcare Provider1,012Jul 7, 2026Hacking/IT IncidentUnder investigation
Wisconsin Department of Health ServicesHealth Plan8,157Jul 1, 2026Unauthorized Access/DisclosureArchive (closed)
Oakwood Lutheran Senior Ministries, Inc.Healthcare Provider1,080May 22, 2026Hacking/IT IncidentUnder investigation
Delta Medical SystemsBusiness Associate1,574Mar 10, 2026Hacking/IT IncidentUnder investigation
Exact Sciences Laboratories LLCHealthcare Provider2,658Dec 29, 2025Unauthorized Access/DisclosureArchive (closed)
Urology Associates of Green Bay, SCHealthcare Provider4,000Dec 24, 2025Unauthorized Access/DisclosureArchive (closed)
Wisconsin Department of CorrectionsHealthcare Provider1,723Nov 12, 2025Unauthorized Access/DisclosureArchive (closed)
Morton Drug CompanyHealthcare Provider40,051Nov 10, 2025Hacking/IT IncidentUnder investigation
Marshfield Clinic Health SystemHealthcare Provider35,952Nov 7, 2025Hacking/IT IncidentUnder investigation
Assisted Living Pharmacy Service, LLCHealthcare Provider5,590Aug 25, 2025Hacking/IT IncidentUnder investigation
zizzl llcBusiness Associate2,416Aug 22, 2025Hacking/IT IncidentArchive (closed)
Jack L MarcusBusiness Associate705Jul 14, 2025Unauthorized Access/DisclosureArchive (closed)
City of FranklinHealthcare Provider3,233Jul 3, 2025Hacking/IT IncidentUnder investigation
Clement ManorHealthcare Provider16,046Jun 25, 2025Hacking/IT IncidentUnder investigation
Radiology CharteredHealthcare Provider12,656May 16, 2025Hacking/IT IncidentArchive (closed)
90 Degree Benefits, Inc. - St. PaulBusiness Associate1,268Apr 18, 2025Hacking/IT IncidentArchive (closed)
Bell Ambulance, Inc.Healthcare Provider237,830Apr 14, 2025Hacking/IT IncidentUnder investigation
Dove HealthcareHealthcare Provider16,255Mar 18, 2025Hacking/IT IncidentArchive (closed)
ARC Community Services, Inc.Healthcare Provider501Feb 2, 2025Hacking/IT IncidentUnder investigation
Samaritan Counseling Center of the Fox ValleyHealthcare Provider956Jan 10, 2025Hacking/IT IncidentUnder investigation
DentaQuestHealth Plan868Jan 6, 2025Unauthorized Access/DisclosureArchive (closed)
Alta Resources Corp.Health Plan12,162Dec 20, 2024Hacking/IT IncidentArchive (closed)
Village of Elm GroveHealthcare Provider668Dec 2, 2024Hacking/IT IncidentArchive (closed)
Tower Clock Eye CenterHealthcare Provider10,737Oct 10, 2024Hacking/IT IncidentArchive (closed)
Richland County, WIHealthcare Provider76,365Sep 9, 2024Hacking/IT IncidentArchive (closed)
Wisconsin Department of Health ServicesHealthcare Provider19,150Jun 21, 2024Hacking/IT IncidentArchive (closed)
Pope & Conner Consulting, Inc.Business Associate1,035May 15, 2024Hacking/IT IncidentArchive (closed)
Bay Oral Surgery & Implant CenterHealthcare Provider13,055Apr 26, 2024Hacking/IT IncidentArchive (closed)
Group Health Cooperative of South Central WisconsinHealth Plan533,809Apr 8, 2024Hacking/IT IncidentArchive (closed)
University of Wisconsin Hospitals and Clinics AuthorityHealthcare Provider85,902Mar 5, 2024Hacking/IT IncidentArchive (closed)
ConsensioHealth, LLCBusiness Associate60,871Jan 4, 2024Hacking/IT IncidentArchive (closed)
First Choice DentalHealthcare Provider1,000Dec 21, 2023Hacking/IT IncidentArchive (closed)
BELLIN HEALTHHealthcare Provider20,790Dec 19, 2023Hacking/IT IncidentArchive (closed)
Independent Vision Group, LTDHealthcare Provider2,931Dec 13, 2023Hacking/IT IncidentArchive (closed)
County of Rock, WIHealthcare Provider10,853Nov 29, 2023Hacking/IT IncidentArchive (closed)
Medical College of WisconsinHealthcare Provider240,667Nov 14, 2023Hacking/IT IncidentArchive (closed)
Grant Regional Health CenterHealthcare Provider4,135May 23, 2023Hacking/IT IncidentArchive (closed)
Chippewa CountyHealthcare Provider842Apr 4, 2023Hacking/IT IncidentArchive (closed)
Bone & Joint Clinic, S.C.Healthcare Provider105,094Mar 13, 2023Hacking/IT IncidentArchive (closed)
90 Degree Benefits, Inc.Business Associate185,459Feb 8, 2023Hacking/IT IncidentArchive (closed)
BayCare Clinic, LLPHealthcare Provider134,000Jan 6, 2023Unauthorized Access/DisclosureArchive (closed)
MJ CareBusiness Associate1,832Dec 29, 2022Hacking/IT IncidentArchive (closed)
The Psychology CenterHealthcare Provider3,614Oct 31, 2022Unauthorized Access/DisclosureArchive (closed)
FOREFRONT DERMATOLOGY, SCHealthcare Provider45,580Oct 20, 2022TheftArchive (closed)
Pynenberg & Scheske DDS,SCHealthcare Provider2,612Oct 20, 2022Hacking/IT IncidentArchive (closed)
Advocate Aurora HealthHealthcare Provider3,000,000Oct 14, 2022Unauthorized Access/DisclosureArchive (closed)
Wisconsin Department of Health ServicesHealth Plan12,358Oct 7, 2022Unauthorized Access/DisclosureArchive (closed)
Common Ground Healthcare CooperativeHealth Plan133,714Aug 12, 2022Hacking/IT IncidentArchive (closed)
Rock County Human Services DepartmentHealthcare Provider25,610Aug 12, 2022Hacking/IT IncidentArchive (closed)

Source: HHS OCR Breach Portal, OCR export October 2026.