Mainline Health Systems reports major data breach affecting over 100,000 patients
Mainline Health Systems Inc in Arkansas has reported a significant data breach to the HHS Office for Civil Rights. The incident involved a hacking or IT incident that compromised information stored on a network server. A total of 101,104 individuals were affected by this security failure. The breach was officially reported on June 23, 2025. Hospital administrators should monitor their own network security protocols and ensure incident response plans are up to date. While this specific event affects Mainline Health Systems, it serves as a reminder of the risks associated with server vulnerabilities. No further details were provided in the initial filing.
Sources differ:
- The HHS OCR record lists a submission date of 06/23/2025. HIPAA Journal reports the intrusion was detected in April 2024 and notification letters began going out on June 20, 2025.
Primary source: HHS OCR Breach Portal — Mainline Health Systems Inc (AR) · reported 06/23/2025 · 101,104 individuals · Checked against the record 2026-10-01