Poisn by oth drug aff the autonm nervous sys, acc, sequela

This code signifies a long-term or late-effect condition resulting from an accidental overdose or adverse reaction to a medication primarily targeting the autonomic nervous system. The initial poisoning event has resolved, but the patient continues to experience residual symptoms or complications directly attributable to that past exposure.

Apply this code when documenting a chronic neurological or systemic issue that is a direct consequence of a previous unintentional poisoning by an autonomic nervous system drug. This is appropriate for follow-up encounters where the acute phase of the poisoning has passed, but ongoing management of its sequelae is required.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a past accidental poisoning by an autonomic drug.
• Do not use for acute poisoning events; this code is exclusively for sequelae.