The Los Angeles Times reports that “The personal information of more than 200,000 people in Los Angeles County was potentially exposed after a hacker used a phishing email to steal the login credentials of 53 public health employees, the county announced Friday.”

Details that were possibly accessed in the February data breach include the first and last names, dates of birth, diagnoses, prescription information, medical record numbers, health insurance information, Social Security numbers and other financial information of Department of Public Health clients, employees and other individuals. “Affected individuals may have been impacted differently and not all of the elements listed were present for each individual,” the agency said in a news release…

The data breach happened between Feb. 19 and 20 when employees received a phishing email, which tries to trick recipients into providing important information such as passwords and login credentials. The employees clicked on a link in the body of the email, thinking they were accessing a legitimate message, according to the agency…

The county is offering free identity monitoring through Kroll, a financial and risk advisory firm, to those affected by the breach. Individuals whose medical records were potentially accessed by the hacker should review them with their doctor to ensure the content is accurate and hasn’t been changed. Officials say people should also review the Explanation of Benefits statement they receive from their insurance company to make sure they recognize all the services that have been billed. Individuals can also request credit reports and review them for any inaccuracies.

From the official statement by the county’s Public Health department:

Upon discovery of the phishing attack, Public Health disabled the impacted e-mail accounts, reset and re-imaged the user’s device(s), blocked websites that were identified as part of the phishing campaign and quarantined all suspicious incoming e-mails. Additionally, awareness notifications were distributed to all workforce members to remind them to be vigilant when reviewing e-mails, especially those including links or attachments. Law enforcement was notified upon discovery of the phishing attack, and they investigated the incident.