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Regulator-posted notice

Breach notice filed by Yale New Haven Health System (April 2025)

Organization named: Yale New Haven Health System Provisional: identity as filed, not yet matched to the directory
Type as the source lists it: Hacking/IT Incident

What the sources say

HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals) Primary notice

Posted on the HHS Office for Civil Rights breach portal with a submission date of April 11, 2025.

Organization as reported
Yale New Haven Health System, CT
Entity type as reported
Healthcare Provider
Category as reported
Hacking/IT Incident
Location of information as reported
Network Server
Submission date
April 11, 2025
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 9354, row:493)
Archived copy
Held in the private archive (provenance)

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.

The source's own words, from the revision above.

Figures, per source

  • 5,556,702 individuals affected (total reported), according to the HHS Office for Civil Rights breach portal, source date April 11, 2025, revision observed 2026-10-18.

Each figure is one source's figure with the basis that source gave. Figures from different sources are shown side by side and are not added, averaged or chosen between.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

  • Submission date (HHS Office for Civil Rights breach portal)
  • Observed by BreachRecords (revision 9354)
  • Approved by a reviewer

Organizations linked by a reviewer

  • Yale New Haven Health System Named as the covered entity Provisional: identity as filed, not yet matched to the directory Linked 2026-10-19, method provisional.

Archived evidence

  • 3dbc27dd5742e041cc1e7fe18cc669e2901fbd3b86b7007ed27948ff4d406e1f
    text/csv, 5,530,996 bytes, retrieved from HHS Office for Civil Rights breach portal, 2026-10-18 16:15 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

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