53,900+ OSF HealthCare patients' data exposed during IT attack 

Nearly 54,000 OSF HealthCare patients' data was exposed during a cybersecurity attack on the Peoria, Ill.-based health system's computer systems earlier this year. 

OSF HealthCare experienced an IT systems outage from April 23-25, which sent the health system into downtime procedures and protocols for two days, according to the Journal Star

OSF HealthCare reported the data breach to HHS on Oct. 1 as affecting 53,907 individuals. In an Oct. 1 notice on its website, the health system said it discovered that an unauthorized party gained access to its systems from March 7 to April 23. As a result, the hacker was able to access certain files belonging to some patients at OSF Little Company of Mary and OSF Saint Paul.  

Patient information exposed by the incident included names, birthdates, Social Security numbers and medical treatment details. OSF HealthCare is offering free credit and identity monitoring services to patients whose Social Security numbers or driver's license numbers were exposed.

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