Sutter Health

Disclosed Nov 3, 2023845,441 affectedConfirmed

The covered entity (CE), Sutter Health, reported that its business associate (BA) experienced a malware attack that affected the protected health information (PHI) of 845,441 individuals. The PHI involved included names, addresses, dates of birth, diagnoses, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided complimentary credit monitoring services and the CE and BA implemented additional administrative, technical, and security safeguards. Staff were retrained to better protect PHI.

What is known

People affected	845,441 (as reported to HHS)
Disclosed	Nov 3, 2023
Happened	May 30, 2023
Attack	Hacking
Data exposed	NamesHealth
Sector	Healthcare · US
Status	Confirmed

Sources

Official noticeoag.ca.gov

California Attorney General breach notice: Sutter Health

Official noticeocrportal.hhs.gov

HHS OCR breach report (archive, resolved): Sutter Health (Healthcare Provider, CA)

Notices filed

Residents of CANov 3, 2023

California AGCount not stated

TotalNov 3, 2023

HHS archive845,441 people

Other breaches at Sutter Health

Breach, details not statedBreach notice filed with the California AG, details not stated.HealthcareUSFeb 7, 2018 Stolen Sutter Medical Foundation desktop held data on over 4 million patientsLost or stolen device exposed names, addresses, dates of birth, insurance details and health records.Lost or stolen device943K affectedHealthcareUSNov 17, 2011

History of this record

attack2026-09-25

unknown to hackingby backfillSource

data_types2026-09-25

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

records_basis2026-09-25

empty to hhsby backfillSource

records2026-09-25

empty to 845441by backfillSource

summary2026-09-25

empty to The covered entity (CE), Sutter Health, reported that its business associate (BA) experienced a malware attack that affected the protected health information (PHI) of 845,441 individuals. The PHI involved included names, addresses, dates ofby backfillSource

Added2026-09-25

First recordedby backfillSource

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

Everything about Sutter Health