Poisoning by penicillins, undetermined, sequela

This code signifies a long-term or residual effect resulting from a past poisoning event involving penicillin, where the intent of the poisoning (accidental, intentional self-harm, assault) cannot be determined. It indicates that the acute phase of the poisoning has passed, but the patient continues to experience health problems directly attributable to that event.

Use this code when documenting a chronic condition or permanent injury that is a direct consequence of a penicillin poisoning, and the original intent of the poisoning is unknown. This applies to follow-up encounters for conditions like persistent organ damage, neurological deficits, or chronic allergic reactions that developed after the acute poisoning.

• Always sequence this sequela code after the code for the specific residual condition.
• Ensure documentation clearly links the current condition to the past penicillin poisoning.
• Do not use for acute poisoning events; a different code from the T36.0X category would be appropriate for the initial encounter.