Poisoning by penicillins, accidental (unintentional), init

This code signifies an adverse event resulting from the accidental or unintentional ingestion or administration of penicillin, leading to a toxic reaction or overdose. It indicates that the patient is in the initial phase of receiving active treatment for this poisoning.

Apply this code when a patient presents with symptoms of penicillin toxicity due to an accidental overdose, medication error, or unintentional exposure. This is appropriate for the initial visit where the poisoning is first diagnosed and treatment is initiated.

• Ensure documentation clearly states "accidental" or "unintentional" and specifies penicillin as the substance.
• Pair with codes for specific manifestations of the poisoning (e.g., rash, anaphylaxis) if applicable.
• The "A" seventh character indicates an initial encounter for this specific poisoning event.