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Regulator-posted notice

Breach notice filed by Massachusetts General Hospital (June 2016)

Organization named: Massachusetts General Hospital 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 OCR breach portal (HIPAA breaches affecting 500 or more individuals) with a submission date of June 29, 2016.

Organization as reported
Massachusetts General Hospital, MA
Entity type as reported
Healthcare Provider
Category as reported
Hacking/IT Incident
Location of information as reported
Network Server
Submission date
June 29, 2016
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 14491, row:5630)
Archived copy
Held in the private archive (provenance)

Hackers caused a breach of protected health information (PHI) at Patterson Dental Supply, Inc., a business associate (BA) of the covered entity (CE), Massachusetts General Hospital. The breach affected the PHI of approximately 4,293 individuals, and included demographic and clinical information. The CE provided breach notification to HHS, affected individuals, and the media. OCR’s investigation revealed that the CE and BA had a business associate agreement in place at the time of the breach. OCR reviewed the BA agreement and determined that it appeared to comply with the requirements of the HIPAA Rules. OCR has opened a separate review of the BA concerning the underlying breach.

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

Figures, per source

  • 4,293 individuals affected (total reported), as reported by the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals), source date June 29, 2016, 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 at the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals)
  • Observed by BreachRecords (revision 14491)
  • Approved by a reviewer

Organizations linked by a reviewer

  • Massachusetts General Hospital 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, from the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals), retrieved 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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