Parenteral controlled substances


Local Chapter Officer
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I do E/M coding for an emergency department and I am trying to find if other coders use, or in what context do they use the information for "Parenteral controlled substances" in the level of risk. I'm not asking about "Drug therapy requiring intensive monitoring for toxicity" but specifically for controlled substances administered in the ED. For example patient given IM injection of Dilaudid for a migraine.

Parenteral-substance is given by a route other than the alimentary canal.
Controlled substance-a schedule I, II, III, IV, or V drug or other substance from Food and Drug Admin.

I've asked this question in other sections of the AAPC forum, but have not received a reply.