Every public data breach

47 disclosed this week · 26,367 on record

M&C Children's Clinic

Disclosed Mar 19, 20136,300 affectedConfirmed

Official notice

On March 19, 2013, the covered entity (CE), M & C Children’s Clinic, reported a breach when a hacker infected its network and encrypted patients’ electronic medical records. The hacker contacted the CE and demanded money in return for allowing access to patients’ records. The breach involved the clinical, financial, and demographic information of 3,667 individuals. The CE provided breach notification to HHS, affected individuals, and the media. Following the incident, the CE improved safeguards by adding enhanced firewalls and antivirus software. It also closed all electronic access ports and revised its data backup and recovery/restoration plan. Additionally, the CE trained staff on privacy and security. OCR provided technical assistance to the CE on the requirements for conducting a thorough assessment of the potential risks and vulnerabilities to ePHI.

What is known

People affected6,300 (as reported to HHS)
DisclosedMar 19, 2013
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.

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