Regulator-posted notice

Breach notice filed by NorthShore University HealthSystem (September 2020)

Organization named: NorthShore University HealthSystem 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 Sept. 4, 2020.

Organization as reported: NorthShore University HealthSystem, IL
Entity type as reported: Healthcare Provider
Category as reported: Hacking/IT Incident
Location of information as reported: Network Server
Submission date: Sept. 4, 2020
Observed by BreachRecords: 2026-10-18 16:15 UTC (revision 12715, row:3854)
Archived copy: Held in the private archive (provenance)

The covered entity (CE), NorthShore University Health System, reported that its business associate (BA) experienced a ransomware attack affecting the electronic protected health information (ePHI) of approximately 345,161individuals. The ePHI involved included names, addresses, dates of birth, Social Security number, financial information, and treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice.
The source's own words, from the revision above.

Figures, per source

348,746 individuals affected (total reported), according to the HHS Office for Civil Rights breach portal, source date Sept. 4, 2020, 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.

2020-09-04Submission date (HHS Office for Civil Rights breach portal)
2026-10-18Observed by BreachRecords (revision 12715)
2026-10-19Approved by a reviewer

Organizations linked by a reviewer

NorthShore University HealthSystem 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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