Health insurer Highmark Inc wants a state court to block any possible deal talks with rivals involving Pennsylvania’s West Penn Allegheny Health System, which last week ended a planned $ 475 million alliance with Highmark. One of the 10 largest U.S. health insurers, with 4.9 million people on its rolls, Highmark said in a news release on Tuesday that it had asked a Pennsylvania Court of Common Pleas for a temporary restraining order to keep West Penn from pursuing affiliation or acquisition talks with third parties. Pittsburgh-based Highmark, which is readying for major shifts in healthcare funding under U.S. reforms [...]