Ransomware hackers are going beyond focusing on data exfiltration or leaking patient records. The focus is to totally disrupt health systems operations with ransomware that locks up electronic health records (EHRs) Without access to these records, hospitals struggle to provide critical care, schedule appointments, bill patients, and process test results. A hospital undergoing a ransomware-induced lockdown can expect their EHR access to shut down, phone lines go dead and anything that relies on their IT infrastructure to be disrupted.
Source: https://www.helpnetsecurity.com/2021/05/18/hackers-attacking-healthcare/