The Yuma Regional Medical Center (YRMC) in Arizona has released details of a ransomware attack that affected their systems in April. According to the notification letter sent to customers, over 700,000 patients had their Social Security Number (SSN) leaked in the attack. Along with SSNs, other data that was potentially accessed includes health insurance information, names, and limited medical data about the customers. No ransomware group has claimed responsibility for the attack, but if it was a group that uses leaked data as a way to force victims into paying ransom, it is likely the data will be posted publicly.