I believe he underwent surgery during the week of the pope's visit. He must be doing well because Fr. Mitch Pacwa has already booked him as a guest for his Mary 14 EWTN Live program.
Fr. Mitch announced on May 14 that the interview with Fr. Corapi scheduled for May 21 was canceled due to his poor health. However, Life on the Rock interviewed Fr. Corapi by phone on May 15 at the beginning of the show. You can watch the archived video at the following link up to May 22. After that, you can search for the same program in their audio archive.
http://ewtn.edgeboss.net/wmedia/ewtn/multicast/video/windowsmedia/lotr_300k.wvx