Poisn by oth drug aff the autonm nervous sys, undet, subs

This code indicates a poisoning event involving a drug that primarily impacts the autonomic nervous system, where the intent (e.g., accidental, intentional self-harm) cannot be determined. The patient is receiving active treatment for the poisoning during this encounter, following the initial phase of care.

Use this code for follow-up encounters where a patient is being treated for the effects of an undetermined poisoning by an autonomic nervous system drug. This applies when the initial treatment has concluded, but ongoing management, monitoring, or further intervention for the poisoning is still required.

• Requires a seventh character "D" for subsequent encounter.
• Always sequence poisoning codes first, followed by codes for any associated manifestations.
• Ensure documentation clearly states the drug class and the undetermined intent of the poisoning.