Thank you for the question.
It would be in your best interest to be seen by a well experienced board-certified plastic surgeon to determine whether you are a candidate for the procedure or if the skin changes caused by radiation expose you to significant risks associated with the procedure (such as wound healing problems etc.).
Once the plastic surgeon determines you are a good candidate and can document that the procedure is medically necessary then there is a good chance that insurance companies/ Medicare may cover the procedure. Unfortunately, Medicare does not pre-authorize so obtaining as much documentation as possible (is in regard to medical necessity) from your other physicians will be helpful.
I hope this helps.