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Yale New Haven Health Services

Disclosed Jul 23, 20215 years ago14,603 affectedConfirmed

Official notice

The covered entity (CE), Yale New Haven Health Services Corporation, reported that its business associate (BA) was the victim of a cyber-attack that compromised the protected health information (PHI) of 14,603 individuals. The PHI involved included names, addresses, phone numbers, email addresses, Social Security numbers, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice on its website. In response to the breach, the BA implemented additional technical safeguards to better protect PHI.

What is known

People affected14,603 (as reported to HHS)
DisclosedJul 23, 2021
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

WhereFiledPeople
HHS archivetotalJul 23, 202114,603

Other breaches at Yale New Haven Health Services

BreachAffected
Disclosed Jun 5, 2020Jun 5, 20206 years agoInsider506
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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