Breachesby GlyphMount Sinai Health System
Disclosed Sep 13, 202087,535 affectedConfirmed
The covered entity (CE), Mount Sinai Health System, reported that its business associate experienced a ransomware attack that affected the electronic protected health information (ePHI) of approximately 87,535 individuals. The ePHI involved included names, addresses, phone numbers, dates of birth, email addresses, gender, and treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice.
What is known
| People affected | 87,535 (as reported to HHS) |
|---|---|
| Disclosed | Sep 13, 2020 |
| Attack | Hacking |
| Data exposed | NamesHealth |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
Notices filed
Other breaches at Mount Sinai Health System
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.