Boston-based Codman Square Health Center's systems were encrypted by ransomware, causing the protected health information of 10,161 patients to be compromised.
On Nov. 28, the center learned that its systems were encrypted by ransomware and began investigating the incident.
The investigation determined that between Nov. 23 and Nov. 27 an unauthorized party had gained access to part of its network and possibly stole certain files, according to a breach notification from Codman Square.
The files contained the personal information of 10,161 patients and included the following information: names, addresses, dates of birth, medical record numbers, diagnoses, other treatment information, and claims information.
Since the incident, Codman Square Health Center said it implemented additional safeguards, and reviewed its policies and procedures relating to data privacy and security.