That includes discussions about medical care and preferences. The points addressed on the Health Care Proxy that Jehovah’s Witnesses use are definitely topics to be covered during these discussions.
يَجِبُ أَنْ يَعْرِفَ ٱلْجَمِيعُ أَنَّهُ بِٱلْإِمْكَانِ تَجَنُّبُ ٱلْمَشَاكِلِ بِٱلتَّخْطِيطِ وَٱلْمُنَاقَشَاتِ .‏