NAPA, CA--(Marketwired - September 21, 2016) - A study issued today of 1,180 claims against internal medicine physicians insured by The Doctors Company, the nation's largest physician-owned medical malpractice insurer, shows that the most common claims are diagnosis related, that internists are more likely to be sued for high-severity injuries than doctors in other specialties, and that both hospitals and physician practices are at risk. The research is based on claims that closed from 2007 to 2014, regardless of the outcome.