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Regulator-posted notice

Breach notice filed by McLaren Health Care (October 2023)

Organization named: McLaren Health Care 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 Oct. 20, 2023.

Organization as reported
McLaren Health Care, MI
Entity type as reported
Healthcare Provider
Category as reported
Hacking/IT Incident
Location of information as reported
Network Server
Submission date
Oct. 20, 2023
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 10402, row:1541)
Archived copy
Held in the private archive (provenance)

The covered entity (CE), McLaren Health Care, reported that it experienced a cyber-attack that compromised the protected health information (PHI) of 2,103,881 individuals. The PHI involved included names, addresses, birthdates, Social Security numbers, claims, and other treatment information. The CE notified HHS, affected individuals, and the media. The CE implemented additional administrative and technical safeguards. OCR provided technical assistance to the CE.

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

Figures, per source

  • 2,103,881 individuals affected (total reported), according to the HHS Office for Civil Rights breach portal, source date Oct. 20, 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 10402)
  • Approved by a reviewer

Organizations linked by a reviewer

  • McLaren Health Care 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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