I can never tell what interface is what in our engine, what can we do?

I would strongly recommend that you have a naming convention for your interfaces.  The two methods that work well are 1) name them by functionality i.e. ADT, ORM, ORU, etc.  It would look something like this ADT_EPIC_OUT_TO_PACS, or 2) by systems i.e. PACS, EMR, etc.  It would look something like this PACS_ ADT_EPIC_OUT or PACS_ORU_EPIC_IN. 

I can already hear the next question.  How do we get everyone to comply.  For employees, I would tie compliance to the naming convention to their annual review.  For contractors, I would add it to their contract.  Any consulting firm will welcome written standards.