Several articles have suggested that in the event of the death of a loved one at home you should call that persons doctor to declare death. Specifically if that person is expected to die and has a DNR.
I would prefer this to the 911 mass decent on the house. I expect that my mother will die in her sleep. She has said she would prefer to go to the mortuary and, even in death, avoid the local hospital which has a long history of screwups.