Yes anticipate that you will have to submit more treatment information to CIC. Would prepare in advance ad submit it. You'l need to include things like diagnosis, treatment she had, possibility of recurrence, ongoing medical needs. Things like routine PET scans, blood tests, oncology follow-ups all costs money and your mother has only recently finished treatment so her follow-ups are likely 3-6 months at the moment. Any longterm health issues related to cancer will also need to be detailed like swallowing difficulties. Nobody can guess what will happen but would get extra documentation ready.