Stanford University School of Medicine

Disclosed May 28, 20212,063 affectedConfirmed

The covered entity (CE), Stanford University School of Medicine, reported that its business associate (BA) experienced a cyber-attack that affected the electronic protected health information (ePHI) of 2,063 individuals. The ePHI involved included names, addresses, email addresses, dates of birth, Social Security numbers, and diagnoses. The CE notified HHS and affected individuals. Following the breach, the CE offered complimentary identity protection and credit monitoring services.

What is known

People affected	2,063 (as reported to HHS)
Disclosed	May 28, 2021
Happened	Jan 21, 2021
Attack	Hacking
Data exposed	NamesHealth
Sector	Healthcare · US
Status	Confirmed

Sources

Official noticein.gov

Indiana Attorney General 2021 data breach report: Stanford University School of Medicine

Official noticeocrportal.hhs.gov

HHS OCR breach report (archive, resolved): Stanford University School of Medicine (Healthcare Provider, CA)

Notices filed

Residents of INMay 28, 2021

Indiana AG15 people

TotalMay 28, 2021

HHS archive2,063 people

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 2063by backfillSource

summary2026-09-25

empty to The covered entity (CE), Stanford University School of Medicine, reported that its business associate (BA) experienced a cyber-attack that affected the electronic protected health information (ePHI) of 2,063 individuals. The ePHI involved iby backfillSource

Added2026-09-25

First recordedby backfillSource

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

Everything about Stanford University School of Medicine