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Regulator-posted notice

Breach notice filed by Mevion Medical Systems (June 2021)

Organization named: Mevion Medical Systems Provisional: identity as filed, not yet matched to the directory

What the sources say

Indiana data breach year-to-date reports Primary notice

Listed in the Indiana Attorney General's data breach report for 2021 with a notification date of June 17, 2021.

Organization as reported
Mevion Medical Systems
Incident dates as reported
March 28, 2021
Notification date
June 17, 2021
Observed by BreachRecords
2026-10-19 04:58 UTC (revision 35042, pdf:2021:page:23:row:768)
Archived copy
Held in the private archive (provenance)

The listing records a filing with the agency; it is not a finding by the agency.

Figures, per source

  • 730 individuals affected (total reported), according to the Indiana Attorney General's data breach reports, source date June 17, 2021, revision observed 2026-10-19.

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.

  • Notification date (Indiana Attorney General)
  • Observed by BreachRecords (revision 35042)
  • Approved by a reviewer

Organizations linked by a reviewer

  • Mevion Medical Systems Named as the filer Provisional: identity as filed, not yet matched to the directory Linked 2026-10-19, method provisional.

Archived evidence

  • c5cab5d93644e1393f6d7953176278c6f504cc54fc2402da8ca94b2d11ad3896
    application/pdf, 1,250,673 bytes, retrieved from Indiana Attorney General, 2026-10-19 04:58 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

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