Yale New Haven Health data breach
Was I affected?
Yale New Haven Health confirmed a breach affecting about 5.6 million people, exposing names, dates of birth, addresses and phone numbers. You may be affected if you were a patient at Yale New Haven Health (including Bridgeport, Greenwich, Lawrence + Memorial or Westerly hospitals) and received a letter starting April 14, 2025.
| Announced | Apr 11, 2025 |
|---|---|
| When it happened | March 8, 2025 |
| People affected | 5.6 million |
| Data exposed | Names, Dates of birth, Addresses, Phone numbers, Email addresses, Social Security numbers and Other details |
| Status | Confirmed by the company or a regulator filing |
What happened
Connecticut's largest health system detected unusual network activity on March 8, 2025 and later confirmed attackers copied patient data. Its HHS filing listed about 5.56 million people, with names, birth dates, addresses, phone and email, race/ethnicity, patient type, medical record numbers and, for some, Social Security numbers. It said medical records, treatment details and financial data were not exposed.
What should I do?
- Freeze your credit for free at Equifax, Experian and TransUnion so no one can open new accounts in your name.
- Sign up for the free credit or identity monitoring offered in the notice letter before its enrollment deadline.
- Request an IRS Identity Protection PIN so nobody can file a tax return with your Social Security number.
- Treat emails, texts and calls that mention Yale New Haven Health as suspect; don't click links or share codes, and contact the company through its official app or website.
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Sources
- Yale New Haven Health data breach affects 5.5 million patients · BleepingComputer (news)
- 5.5 million patients affected by data breach at Yale New Haven Health · SecurityWeek (news)