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Marshfield Clinic Health System

healthcareHealthcareUnited States of America

Marshfield Clinic Health System is a healthcare organisation in United States of America. It appears on the HHS OCR breach portal with 1 confirmed incident; the most recent notice was filed on November 7, 2025.

Data as of August 28, 2026.

Sources

HHS OCR breach report (current)

Confirmed incident

US-WI — Hacking/IT Incident

Disclosed: November 7, 2025
Records affected: 35,952

Was I affected? →

Timeline

November 7, 2025
Reported to regulator Regulator
HHS OCR breach portal listing: Hacking/IT Incident; Email
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Litigation

Possible litigation — multiple candidate dockets found, not yet resolved to a single case.