What I think the OP needs to know is that hospice care does not pay the Assisted Living facility costs , just the care of the additional services of the hospice care workers. If in a nursing home under hospice, as another posted above, the nursing home portion of the monthly cost of care is only covered up to 100 days, assuming the patient was transferred from a hospital. I don't believe a hospital would allow a patient to stay in hospital for just palliative care. If the patient is transferred to a hospice facility, then medicare foots the entire bill. In the latter case the hospice facility would have to agree to accept the patient, which would I believe be largely dependent on the short term prognosis of the patient.
My DF was transferred from the hospital to a Hospice Facility at the end of his life. He passed away there after 3 days. No bill. My DM, who resided in a Memory Care Assisted Living facility, was placed on Hospice, in August of 2019. So palliative care only. Hospice workers came in several times a week to monitor her health. She was not considered eligible for a Hospice facility, as death was not imminent. She passed in February of 2020. So ongoing Bill's for her monthly care at the ALF, with no increase or decrease in the monthly costs during her time on hospice. There were no bill's from the hospice agency during that time. She was transferred to the hospital after a bad fall in early February, and succumbed a week later. No hospital bills.