Every public data breach

44 disclosed this week · 26,355 on record

Mariner Management Group

Disclosed Nov 8, 20231,756 affectedConfirmed

Official notice

The covered entity (CE), Mariner Management Group, reported that it experienced a cyberattack that affected the protected health information (PHI) of 1,756 individuals. The PHI involved included names, addresses, Social Security numbers, claims information, diagnoses and conditions, and medications. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE implemented additional technical safeguards to better protect PHI.

What is known

People affected1,756 (as reported to HHS)
DisclosedNov 8, 2023
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
Added2026-09-25
First recordedby backfillSource

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

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