Gloria Foster wasn’t ready for hospice, even though, with a prognosis of less than six months to live, she qualified for it. She was debilitated by diabetes and congestive heart failure, and was living with both a pacemaker and a device to help pump blood from her heart to the rest of her body. She also was tethered to an oxygen tank. But Foster didn’t want to enter hospice, if, as is normally required by Medicare, she would have had to forgo treatments that might, against all odds, reverse the course of her disease. “Why did I need hospice?” Foster, 73, asked in a phone interview recently fro…