Every public data breach

47 disclosed this week · 26,367 on record

SSM Health Cancer Care

Disclosed Oct 9, 2015643 affectedConfirmed

Official notice

The covered entity (CE), SSM Health Cancer Care, erroneously mailed letters to the addresses of other patients due to using an inaccurate electronic file. The breach affected 670 individuals and included individuals’ names and their inferred treatment relationship. The CE provided breach notification to HHS, affected individuals, and the media. The CE performed a root cause analysis to identify risk areas and opportunities to strengthen controls and also retrained the individual who had erroneously sent out the mailings. The CE also created a new policy and procedures for patient mailings. OCR obtained documentation evidencing that the CE implemented the corrective actions listed.

What is known

People affected643 (as reported to HHS)
DisclosedOct 9, 2015
AttackInsider
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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