No, they can not.  Your Mother does not own land "A" she is only the holder of a life estate.  It is only an "interest" in land for her lifetime.  She could not mortgage it or sell it.  She could only live there or collect income from it until her death. In this respect it is no different than someone who rents.  You have what is known as the "remainder interest" in the land given you by the only person who could pass the land on after his death: your Father.  Your property should be safe from any attachment that is attempted by any creditor, Medicare or otherwise.  Make sure that all our ownership documents are in place.  Good luck.