Every public data breach

44 disclosed this week · 26,355 on record

Horizon House

Disclosed Sep 17, 202135,107 affectedConfirmed

Official notice

The covered entity (CE), Horizon House, reported that it experienced a ransomware attack that compromised the protected health information (PHI) of approximately 27,823 individuals. The PHI involved included names, dates of birth, drivers’ license numbers, addresses, Social Security numbers, claims and financial information, diagnoses, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice on its website. In its mitigation efforts, the CE implemented additional administrative, technical, and security safeguards to better protect its PHI. OCR provided technical assistance regarding the HIPAA Security Rule.

What is known

People affected35,107 (as reported by the organization)
DisclosedSep 17, 2021
DiscoveredSep 3, 2021
HappenedMar 2, 2021
AttackHacking
Data exposedNamesGovernment IDsHealthInsuranceCredentials and tokens
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
sector2026-09-25
other to healthby backfillSource
attack2026-09-25
unknown to hackingby backfillSource
summary2026-09-25
empty to The covered entity (CE), Horizon House, reported that it experienced a ransomware attack that compromised the protected health information (PHI) of approximately 27,823 individuals. The PHI involved included names, dates of birth, drivers’ by backfillSource
source2026-09-25
empty to https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/files/Data-Breach-Year-to-date-Report-2021-1.pdfby backfillSource
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (Delaware DOJ), confirmed by Delaware DOJ. Record counts are as reported. Not legal advice.

Everything about Horizon House