Healthcare Provider · Under investigation
Marshfield Clinic Health System
35,952 individuals · submitted November 7, 2025
About this report
Marshfield Clinic Health System, listed by OCR as a healthcare provider in WI, reported a breach of unsecured protected health information to the HHS Office for Civil Rights on November 7, 2025, affecting 35,952 individuals. OCR lists the breach type as Hacking/IT Incident and the location of the information as Email. Business associate present: No. OCR status: under investigation.
OCR has not published a case summary for this report. The text above restates the structured fields OCR lists.
- Organization
- Marshfield Clinic Health System
- State
- WI
- Entity type
- Healthcare Provider
- Individuals affected
- 35,952
- Submission date
- November 7, 2025
- Breach type
- Hacking/IT Incident
- Location of information
- Business associate present
- No
- OCR status
- Under investigation
More breach reports in WI
WI · Jul 10, 2026
Health Payment Systems, Inc.
9,380 individuals
WI · Jul 7, 2026
T.A. Solberg Co., Inc
1,012 individuals
WI · Jul 1, 2026
Wisconsin Department of Health Services
8,157 individuals
WI · May 22, 2026
Oakwood Lutheran Senior Ministries, Inc.
1,080 individuals
WI · Mar 10, 2026
Delta Medical Systems
1,574 individuals
WI · Dec 29, 2025
Exact Sciences Laboratories LLC
2,658 individuals
More Hacking/IT Incident reports
NY · Oct 9, 2026
Photon Health
30,625 individuals
CA · Oct 9, 2026
Allswell Health Medical Group PA
638 individuals
WA · Oct 8, 2026
Anup K. Deol, OD PS d/b/a Eye Care Center of Snohomish
3,059 individuals
NY · Oct 8, 2026
Cognitive Health Technologies LLC
49,467 individuals
GA · Oct 7, 2026
The Speech Clinic, LLC
2,168 individuals
PA · Oct 6, 2026
Secure Healthcare Information Management, LLC
6,810 individuals