I am learning to code E/M and ER charges. I am having a problem knowing what is an infusion or just an IV or hydration. Is there a site or anything out there that can tell me what was given is an infusion or hydration? For example all I get is: D5 and the route is IV and total infusion is done in so much time. D5 does not tell me anything. Is there a book or web site or software that could help me to understand? Any suggestion please!!!!!!