Two class action lawsuits have been filed against the Chattanooga Heart Institute.
One was brought by the Mason Law Firm and another by a Memphis attorney. They were filed in Hamilton County Circuit Court.
Still other class action lawsuits have been filed against CHI in Federal Court.
One lawsuit says extensive personal information was released during the breach of over 170,000 current and former patients.
CHI was alerted to the cybersecurity attack around April 17. It was found that it occurred between March 8-16.
The suit says those individuals whose data was leaked will be at risk for financial harm for the rest of their lives, saying the information taken was "a gold mine for data thieves."
It says the data could be used for a variety of financial crimes.
The suit says there is no indication that CHI has since improved its data protection.
It asks for unspecified compensatory and punitive damages.