Like we've seen in other breaches, officials say they found out nearly two months ago. They say demographic information was stolen like on race and gender but not credit card or medical background.
The Department of Health and Human Services and attorneys are investigating. Officials believe former employees took the info to use for their own practice.
"The employees that left formed their own company," said Timothy Hillard, "and they want to use that patient database. So, they can contact those patients to bring them into their own research company."
We're told patients affected by the breach have been notified. If you believe you're a victim of fraud, call a local credit bureau to have a fraud alert put on your credit cards.