The recent breach of a computer system at a hospital in Los Angeles is highlighting the dangers of hackers targeting medical data and devices. The Hollywood Presbyterian Medical Center paid nearly $17,000 to hackers after their communications were shut down in a "ransomware" attack earlier this month, hospital officials told ABC News on Wednesday. The hospital paid the fee in 40 bitcoins to get access to their system again, officials said. Bitcoin is an electronic currency often used for online transactions. Hospitals and medical providers can provide a trove of valuable information that hackers are eager to get their hands on, experts said.