Who do I contact to cut Medicare red tape?

My dad is in a nursing home with necrosis in his foot and renal failure. He refuses surgery and dialysis. His doctor wants him in hospice care.

The problem is he has been in Hospice care since his renal failure was diagnosed 4 years ago. Medicare says they will no longer pay for hospice because he has been on hospice for too long.

We do have a lawyer working on it, I was wondering would it help to contact his Senators and Congressman? I want to, but mom and my sisters don’t want to bother them. For the record, my dad confirmed his current Senator and baptised her kids.