from the medical words "idiopathic" meaning unknown source of disease, and "iatrogenic" meaning that the problem occurred because of medical practice.
Idioiatrogenic is therefore a problem that the doctor is ignorant of causing.
What do you mean Seaverman put Mr Jones on anticoagulants? He was the one who admitted him for the bleeding ulcer in the first place! That's some idioiatrogenic medicine there.