Malpractice is cited one reason:
Meanwhile, getting sued by a patient is a major concern. Of course, doctors who make fatal mistakes and who are unqualified should be held responsible. But there’s evidence that the bulk of lawsuits brought are frivolous. Of all malpractice lawsuits brought to jury trial in 2004, the defendant won 91% of the time. Only 6% of all lawsuits go to trial; those that aren’t thrown out are settled.