Is the nursing home supposed to provide residents with a wheelchair?

My Mother, who has Alzheimer's, is in a Nursing Home. She fell and broke her hip 10 months ago and after surgery went to rehab and then onto a nursing home. The rehab facility ordered her a wheelchair and told me her insurance would pay for it. She used the wheelchair until last month when I received a bill for $400 from the company that it was being supplied through. I called them and they said her insurance denied the claim. Her insurance said it was because a new year rolled over and her deductible had not yet been met and then they said since she was in a nursing home, that facility should be the one that supplied the wheelchair anyway. The nursing home verified this was true and promised to supply her with one. I called the rental place and told them what I was told and they sent someone out THAT DAY to pick up the wheelchair. Most people who are placing their LO in a nursing home have no experience in doing so. How are we supposed to know these things? How often are we taken advantage of? We had to put Mother into a Medicaid situation because she simply ran out of money and a LTC insurance refused to pay. Getting bills after the fact means this has to be paid by me and I am retired, living a very frugal lifestyle. Is there a foundation, etc that helps people understand what their rights and expectations should be when placing a LO in a home? I am not talking about help with paying something I just mean is there a place to go for information. I guess mostly we don't even know what questions to ask must less where to go for info. Finding out who I should have talked to afterwards is a sad commentary on our society and the way it treats our elderly. How can we change this?