HHS OCR report · 2019
Mount Sinai Hospital data breach
OCR report facts
- Covered entity
- Mount Sinai Hospital
- Entity type
- Healthcare Provider
- State
- New York
- Individuals affected
- 33,730
- Submission date
- Aug 2, 2019
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Other
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The covered entity (CE), Mount Sinai Hospital, reported that its business associate (BA), Retrieval-Masters Creditors Bureau, Inc., doing business as American Medical Collection Agency (AMCA), was the victim of a cyber-attack involving the electronic protected health information (ePHI) of 33,730 individuals. The ePHI involved included names, dates of service, clinical information, and health insurance information. The CE notified HHS, affected individuals, and the media. OCR’s investigatio...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Mount Sinai Hospital data breach?
The report to HHS OCR lists 33,730 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Aug 2, 2019.
What type of breach was it?
The OCR portal lists the type of breach as Hacking/IT Incident, with the breached information located in: Other.
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 Mount Sinai 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 Mount Sinai Hospital.