HHS OCR report · 2023
Hayward Sisters Hospital d/b/a St. Rose Hospital data breach
OCR report facts
- Covered entity
- Hayward Sisters Hospital d/b/a St. Rose Hospital
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 115,241
- Submission date
- Jan 27, 2023
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
The covered entity (CE), Hayward Sisters Hospital dba St. Rose Hospital, reported that it was the subject of a ransomware attack that affected the protected health information (PHI) of 115,241 individuals. The PHI involved included names, addresses, dates of birth, Social Security numbers, drivers’ license and passport numbers, e-mail addresses, claims and financial information, diagnoses, lab results, medications, health insurance information, and other treatment information. The CE notifie...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Hayward Sisters Hospital d/b/a St. Rose Hospital data breach?
The report to HHS OCR lists 115,241 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Jan 27, 2023.
What type of breach was it?
The OCR portal lists the type of breach as Hacking/IT Incident, with the breached information located in: Network Server.
Is the investigation still open?
No. The report is in the OCR portal archive, which holds reports where OCR has closed its review.
Is a breach notice letter from Hayward Sisters Hospital d/b/a St. Rose Hospital legitimate?
This site cannot verify letters. Check the sender against the organisation's official website and the HHS OCR breach portal, and avoid calling numbers or clicking links only listed in an unexpected message. See our guide on what to do after a data breach notice.
Source: HHS OCR Breach Portal, OCR export October 2026. Network USA is not affiliated with HHS or Hayward Sisters Hospital d/b/a St. Rose Hospital.