OSF HealthCare began notifying patients Oct. 1 that their protected health information was exposed for more than six weeks during an attack on its IT systems earlier this year.
OSF HealthCare experienced a computer systems outage from April 23-25, which sent the health system into downtime procedures and protocols for two days, the Journal Star reported.
In an Oct. 1 notice on its website, OSF HealthCare said the outage was the result of a data security incident. After investigating the incident, the health system 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.