(Portland, OR) -- Providence Health faces a class action lawsuit over potential disease exposures. Two weeks ago, Providence released a public safety notice that a doctor with the Oregon Anesthesiology Group wasn't following infection control procedures. Providence notified patients who were told to get tested for diseases like HIV, hepatitis B, and hepatitis C. Four patients have filed the lawsuit which claims 22-hundred people were possibly exposed. The lawsuit claims gross negligence on the part of Providence and the Oregon Anesthesiology Group.