Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

ATSG

Disclosed Oct 4, 2024909,469 affectedConfirmed

Official notice

What is known

People affected909,469 (as reported to HHS)
DisclosedOct 4, 2024
HappenedSep 5, 2024
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Official noticeocrportal.hhs.gov
HHS OCR breach report: ATSG (Business Associate, NY)
Official noticein.gov
Indiana Attorney General 2025 data breach report: ATSG

Notices filed

TotalOct 4, 2024
HHS OCR909,469 people
Residents of INFeb 21, 2025
Indiana AG9 people
History of this record
occurred2026-09-25
empty to 2024-09-05by backfillSource
Added2026-09-25
First recordedby backfillSource

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

Everything about ATSG