He can stay right where he is.
If that's true...
He most likely has been leaving the prison location 1 - 3 times per week for kidney dialysis for those with end stage kidney disease...
You don't need to go to some special bunker in a hospital for dialysis treatment. You can do that shit in a small room, anywhere. Like at home. It's just a couple of tubes and a pump.

...
He should not be given any special treatment just because he's dying. Yet, if he was unconscious, coma, lying helpless on the prison floor, swelling all over his body and persistent nausea...

He is old enough that Medicare not him will pay. So we pay, one way or another.probably cheaper for society to let him pay for his own healthcare and shit.