Poisoning by antiallerg/antiemetic, undetermined, sequela

This code signifies a long-term complication or residual effect resulting from a poisoning event involving antiallergic or antiemetic medications, where the intent of the poisoning (e.g., accidental, intentional self-harm, assault) cannot be determined. These sequelae can manifest as various chronic health issues directly attributable to the initial drug toxicity.

Apply this code when documenting a patient presenting with a current, chronic condition or lasting impairment that is a direct consequence of a past poisoning by antiallergic or antiemetic drugs, and the original poisoning's intent was never established. This is appropriate for follow-up encounters addressing these persistent effects, long after the acute poisoning episode has resolved.

• Always sequence this sequela code after the code(s) for the specific residual condition(s) being treated.
• Ensure documentation clearly links the current condition to the past, undetermined antiallergic/antiemetic poisoning.
• Do not use this code for acute poisoning events; use the appropriate acute poisoning code with the 7th character "A" (initial encounter).