Poisn by oth antieplptc and sed-hypntc drugs, undet, sequela

This code indicates a long-term health problem or condition resulting from a past poisoning by an antiepileptic or sedative-hypnotic medication, where the intent of the poisoning (accidental, intentional self-harm, assault) could not be determined. It signifies that the acute poisoning event has resolved, but the patient continues to experience residual effects.

Apply this code when documenting a patient's current health status that is a direct consequence of a previously undiagnosed or undetermined antiepileptic or sedative-hypnotic drug poisoning. This is appropriate for follow-up visits where the sequelae are being managed, such as chronic neurological deficits or organ damage attributed to the past event.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly links the current condition to the past poisoning event.
• Only use for sequela; do not use for acute poisoning events.