ATI Holdings

Disclosed Mar 12, 201845,800 affectedConfirmed

The covered entity (CE), ATI Holdings, reported that multiple employees were the victims of an email phishing attack affecting the protected health information (PHI) of 2,645 individuals. The PHI involved included names, dates of birth, Social Security numbers, addresses, drivers’ license numbers, diagnoses/conditions, medications prescribed, and other financial and treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice on its website. In response to the breach, the CE implemented additional technical safeguards and retrained its staff on email security.

What is known

People affected	45,800 (as reported to HHS)
Disclosed	Mar 12, 2018
Happened	Jan 9, 2018
Attack	Hacking
Data exposed	NamesHealth
Sector	Healthcare · US
Status	Confirmed

Sources

Official noticejustice.oregon.gov

Oregon DOJ breach notice: ATI Holdings

Official noticein.gov

Indiana Attorney General 2018 data breach report: ATI Holdings

Official noticeocrportal.hhs.gov

HHS OCR breach report (archive, resolved): ATI Holdings (Business Associate, IL)

Notices filed

TotalMar 12, 2018

HHS archive45,800 people

Residents of INMar 27, 2018

Indiana AG78 people

TotalApr 13, 2018

HHS archive2,645 people

Residents of ORJul 5, 2018

Oregon DOJ45,799 people

History of this record

records_basis2026-09-25

organization to hhsby backfillSource

records2026-09-25

34665 to 45800by backfillSource

disclosed2026-09-25

2018-03-27 to 2018-03-12by backfillSource

sector2026-09-25

other to healthby backfillSource

attack2026-09-25

unknown to hackingby backfillSource

data_types2026-09-25

[] to ["names","health"]by backfillSource

summary2026-09-25

empty to The covered entity (CE), ATI Holdings, reported that multiple employees were the victims of an email phishing attack affecting the protected health information (PHI) of 2,645 individuals. The PHI involved included names, dates of birth, Socby backfillSource

records_basis2026-09-25

empty to organizationby backfillSource

records2026-09-25

empty to 34665by backfillSource

disclosed2026-09-25

2018-07-05 to 2018-03-27by backfillSource

Added2026-09-25

First recordedby backfillSource

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

Everything about ATI Holdings