Regulator-posted notice

Breach notice filed by Johns Hopkins Health System Corporation (July 2023)

Organization named: Johns Hopkins Health System Corporation 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 July 31, 2023.

Organization as reported: Johns Hopkins Health System Corporation, MD
Entity type as reported: Business Associate
Category as reported: Hacking/IT Incident
Location of information as reported: Network Server
Submission date: July 31, 2023
Observed by BreachRecords: 2026-10-18 16:15 UTC (revision 10558, row:1697)
Archived copy: Held in the private archive (provenance)

John Hopkins Health System Corporation, the covered entity (CE), reported that it experienced a malware attack that compromised the protected health information (PHI) of 2,584 individuals. The PHI involved included names, addresses, birthdates, and treatment 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 additional technical safeguards.
The source's own words, from the revision above.

Figures, per source

2,584 individuals affected (total reported), according to the HHS Office for Civil Rights breach portal, source date July 31, 2023, 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.

2023-07-31Submission date (HHS Office for Civil Rights breach portal)
2026-10-18Observed by BreachRecords (revision 10558)
2026-10-19Approved by a reviewer

Organizations linked by a reviewer

Johns Hopkins Health System Corporation Named as a service provider 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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