Every public data breach

44 disclosed this week · 26,355 on record

Children's National Medical Center

Disclosed Feb 24, 201518,000 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 exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at Children's National Medical Center

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.

Everything about Children's National Medical Center