A person's medical information can be worth 10 times more than a credit card number on the black market.
Last month, the FBI warned health care providers to guard against cyberattacks after one of the largest U.S. hospital operators, Community Health Systems Inc., said Chinese hackers had broken into its computer network and stolen the personal information of 4.5 million patients.
Security experts say cybercriminals are increasingly targeting the $3 trillion U.S. health care industry, where many companies use aging computer systems that lack the latest security features.