Breachesby GlyphYale New Haven Health System
Disclosed Apr 11, 20255,556,702 affectedConfirmed
The covered entity (CE), Yale New Haven Health System, reported that it experienced a hacking incident that affected the protected health information (PHI) of 5,556,702 individuals. The PHI involved included names, dates of birth, addresses, and Social Security numbers. The CE notified HHS, affected individuals, the media, and implemented substitute notice. In response to the breach, the CE implemented additional administrative, technical, and security safeguards.
What is known
| People affected | 5,556,702 (as reported to HHS) |
|---|---|
| Disclosed | Apr 11, 2025 |
| Attack | Hacking |
| Data exposed | NamesHealth |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
Notices filed
History of this record
First recordedby backfillSource
First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.