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Children's National Medical Center

Disclosed Feb 24, 201511 years ago18,000 affectedConfirmed

Official notice

Employees of the covered entity (CE), Children’s National Medical Center (CNMS), responded to phishing emails they believed were legitimate emails. Over 20,000 individuals were affected by the breach which involved demographic, clinical and health insurance information, including a limited number of social security numbers. The CE provided breach notification to HHS, affected individuals, and the media, and offered 12 months of free identity monitoring for those whose social security number was compromised. Following the breach, the CE identified source attacks, remediated accounts, removed exfiltration software, and implemented safeguards to increase firewall protections and inspection of e-mails (monitoring, scanning, and rewriting of embedded Internet addresses). In addition, the CE updated its security policy and retrained employees. OCR obtained assurances that the CE has implemented the corrective actions listed above.

What is known

People affected18,000 (as reported to HHS)
DisclosedFeb 24, 2015
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

WhereFiledPeople
HHS archivetotalFeb 24, 201518,000

Other breaches at Children's National Medical Center

BreachAffected
Disclosed Mar 30, 2018Mar 30, 20188 years agoLost or stolen device722
Disclosed Apr 25, 2016Apr 25, 201610 years agoInsider4,107
History of this record
  • 2026-09-25 · added · backfill source

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

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