Every public data breach

44 disclosed this week · 26,355 on record

Oklahoma State University

Disclosed Jan 5, 2018279,865 affectedConfirmed

Official notice

Oklahoma State University – Center for Health Sciences (OSU-CHS) has paid $875,000 to the Office for Civil Rights (OCR) at the U.S. Department of Health and Human Services (HHS) and agreed to implement a corrective action plan to settle potential violations of the Health Insurance Portability and Accountability Act (HIPAA) Privacy, Security, and Breach Notification Rules. OSU-CHS is a public land-grant research university which provides preventive, rehabilitative, and diagnostic care in Oklahoma. On January 5, 2018, OSU-CHS filed a breach report stating that an unauthorized third party gained access to a web server that contained electronic protected health information (ePHI). The hacker installed malware that resulted in the disclosure of the ePHI of 279,865 individuals, including their names, Medicaid numbers, healthcare provider names, dates of service, dates of birth, addresses, and treatment information. OSU-CHS initially reported that the breach occurred on November 7, 2017, but later reported that the ePHI was first impermissibly disclosed on March 9, 2016. OCR’s investigation found potential violations of the HIPAA Rules including impermissible uses and disclosures of PHI;

What is known

People affected279,865 (as reported to HHS)
DisclosedJan 5, 2018
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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