HHS OCR report ยท 2023
Johns Hopkins Medicine data breach
OCR report facts
- Covered entity
- Johns Hopkins Medicine
- Entity type
- Healthcare Provider
- State
- Maryland
- Individuals affected
- 310,405
- Submission date
- Jul 25, 2023
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
John Hopkins Medicine, the covered entity (CE), reported that it experienced a malware attack that compromised the protected health information (PHI) of 310,405 individuals. The PHI involved included names, addresses, birthdates, diagnoses, Social Security numbers, and claims information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In its mitigation efforts, the CE provided complimentary credit monitoring services and implemented addition...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Johns Hopkins Medicine data breach?
The report to HHS OCR lists 310,405 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Jul 25, 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 Johns Hopkins Medicine 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 Johns Hopkins Medicine.