>> kathryn trepinski: devastating. >> pelley: kathryn trepinski is a lawyer who represents patients. oes not represent ashley's family, but she has filed suit against anthem and other insurers. >> trepinski: there's untold suffering, and the family is usually left in the very difficult position of either paying for the care out of pocket, which is tens of thousands of dollars, or they say no to their loved one, to their child. >> pelley: anthem says that reviews are checked by a supervising doctor, but when we obtained ashley's denial letter, we found her review by tim jack, m.d., was supervised by timothy jack, m.d. so, he signs the documents twice? >> trepinski: yes, except that he doesn't actually sign them himself. it's a robo-signature. >> pelley: dr. jack has acknowledged an anthem computer put his name to letters he doesn't see, and on cases he didn't review. >> trepinski: it suggests a layer of review that's not there. because the signing doctor is described in the letter as having made that coverage determination and he didn't. >> pelley: we tried to reach dr. jack in calls a