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Premise Health Insider Breach Affects Nearly 417,000 Patients

Premise Health Insider Breach Affects Nearly 417,000 Patients

First seen 12 Nov 2026, 22:14 UTC • •
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ThreatCluster AI
ThreatCluster •November 12, 2026 at 22:14 UTC
  • •Premise Health breach affects 417,000 individuals across five states.
  • •Sensitive data compromised includes Social Security numbers and health information.
  • •The breach was due to insider actions, not external hacking.

An insider data breach at Premise Health Holding has impacted approximately 417,000 individuals across five states, with the potential for millions affected nationwide. The breach was discovered on September 18, 2026, when the company identified an employee who misappropriated sensitive data starting on March 26. The compromised information includes names, addresses, dates of birth, Social Security numbers, and health insurance details. Premise Health has reported the incident to law enforcement and stated that it was not a hacking or ransomware event. The employee involved has been terminated, and the company is enhancing its security measures. Reports have been filed with the attorneys general of Texas, South Carolina, Washington, Massachusetts, and Vermont, detailing the number of affected individuals in each state. Further analysis of the data was completed on October 14, 2026, confirming the breach's impact on personal information.

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Timeline

2026-09-18
Breach discovered
Premise Health identified an employee misappropriating data starting on March 26.
Bankinfosecurity
2026-10-14
Data analysis completed
Further analysis confirmed that patients' personal information had been affected.
Bankinfosecurity
Recent
Reports filed with state AGs
Premise Health filed breach reports with the AGs of five states detailing affected individuals.
Bankinfosecurity

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Common questions

How many individuals are affected?
Approximately 417,000 individuals are reported affected across five states.
What type of data was compromised?
Compromised data includes names, addresses, Social Security numbers, and health insurance information.
Was this a hacking incident?
No, Premise Health stated that this was not a hacking or ransomware event but an insider breach.