According to In Touch magazine the ear, nose and throat specialist was subpoenaed when the family of John Ritter sued doctors for negligence in treating the actor who died of an aortic dissection in 2003.
But, according to In Touch, the medic allegedly managed to avoid being served.
A source told the magazine: “She, or people close to her, refused to accept service of the subpoena.
“She claimed she never treated Ritter.”
It’s been a tough few weeks for Korovin who has yet to answer uncomfortable questions about what happened in the Manhattan clinic where Rivers went for a planned endoscopy on August 28.