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Regulator-posted notice

Breach notice filed by Johns Hopkins Medicine (July 2023)

Organization named: Johns Hopkins Medicine 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 25, 2023.

Organization as reported
Johns Hopkins Medicine, MD
Entity type as reported
Healthcare Provider
Category as reported
Hacking/IT Incident
Location of information as reported
Network Server
Submission date
July 25, 2023
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 10578, row:1717)
Archived copy
Held in the private archive (provenance)

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 additional administrative and technical safeguards.

The source's own words, from the revision above.

Figures, per source

  • 310,405 individuals affected (total reported), according to the HHS Office for Civil Rights breach portal, source date July 25, 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.

  • Submission date (HHS Office for Civil Rights breach portal)
  • Observed by BreachRecords (revision 10578)
  • Approved by a reviewer

Organizations linked by a reviewer

  • Johns Hopkins Medicine Named as the covered entity 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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