1. An intense aversion for the medical profession or for medical doctors: Jane was suffering from iatromisia; so, she always became very tense and anxious just with the thought of going to any doctor; and, although she didn't go very often, when it was absolutely necessary, she always asked her best friend to go with her.

One fear or iatromisia about going to see doctors is because patients associate them with illnesses or injuries and so they are afraid of getting germs or diseases from them or other patients who are in the waiting room.
2. Etymology: from Greek iatro-, "physician, medicine" + Greek misos, "hatred"; from miseo, "I hate".