Hospice care is for the dying. It helps patients manage pain so they can focus on spending their remaining time with loved ones. But in recent years, nearly one in five patients have been discharged from hospice before they die, according to government reports.

A study published last month in the journal Health Affairs finds that hospices with the highest rate of so-called "live discharges" also have the highest profits. The lead author is Rachel Dolin, a David A. Winston fellow researching health policy. Her paper found an association between high live discharge rates and high profit margins, but it didn't determine the cause.

"It's important to continue to study this area to get a better sense as to whether profits are driving the decision to discharge patients from hospice, rather than patient preferences and needs," says Dolin.

To qualify for hospice care, two doctors must certify that a patient is expected to live no more than six months. But patient James B. Nelson discovered that sometimes the doctors are wrong.

"It was decided that I was not dying fast enough," he told Arizona Public Media in 2015. "And so, to put it most succinctly, I flunked the hospice program."

Nelson died a few months after giving that interview, but his situation isn't all that unusual.

Government reports show that the median rate of hospice patients discharged before death has climbed steadily since at least 2000, peaking in 2012 and 2013 at almost one patient in five, though more recently the percentage has declined somewhat. But the rate actually varies widely from one care organization to another. Some hospices discharge less than 2 percent of their patients prior to death, while others discharge more than 80 percent. Non-profits have lower rates of live discharge than for-profit hospices. Regionally, live discharge rates are highest in the South.

It's important to understand, though, that when patients are discharged from hospice, they don't necessarily go anywhere. Hospice agencies, whether they are independent or affiliated with an institution like a hospital, usually deliver services to patients in their homes.

Medicare pays the bills for the vast majority of patients receiving hospice care, at a cost to the government of at least $15 billion a year. Federal regulators have questioned whether high rates of live discharge mean that hospices are making money by admitting patients who aren't actually dying.

But these decisions aren't that clear cut, says Dr. Joe Rotella, chief medical officer for the American Academy of Hospice and Palliative Medicine. "We see more and more patients that have conditions like Alzheimer's disease or Parkinson's disease that don't always follow a predictable course," says Rotella.

Some who study aging are concerned that certain hospices are gaming the system. That's a worry of Susan Enguidanos, an associate professor in the Leonard Davis School of Gerontology at the University of Southern California. For example, she says that some hospices may be trying to avoid paying for costly treatments by discharging patients temporarily when they need to go to the hospital.

"Individuals that are going in for these very brief health issues are coming out and then, they're being readmitted to those [same] hospices," says Enguidanos.

That's not a good reason to discharge someone, says John Keyserling, senior vice president for communications and policy at the National Hospice and Palliative Care Organization, the trade association for hospice providers.

"Any association between profit margins and clinical decision making is inappropriate and not something that the hospice community supports," Keyserling says.

That hospice community has nearly doubled in size since 2000. Susan Enguidanos says it's also changed a lot.

"Hospice organizations started as grass root efforts and were largely non-profit for a long time," she says. "Now we've had a huge increase in for-profit hospices." There's a concern, says Enguidanos, that by discharging patients early, some hospices may be "trying to avoid costs that they should be responsible for."

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