Poisoning by penicillins, undetermined, initial encounter

This code signifies an adverse reaction to penicillin, where the intent (accidental, intentional self-harm, assault) of the exposure cannot be determined. The patient is in the acute phase of treatment for the poisoning.

Apply this code when a patient presents with symptoms of penicillin poisoning, and documentation does not specify whether the exposure was accidental, intentional, or due to assault. This code is appropriate for the initial visit or encounter where the poisoning is being evaluated and treated.

• Always sequence this code first if it is the primary reason for the encounter.
• Requires an additional code to specify the manifestation of the poisoning (e.g., rash, anaphylaxis).
• Only use the "A" (initial encounter) seventh character for the first time the patient is seen for this specific poisoning episode.