Poisoning by oth drug aff the autonm nervous sys, acc, subs

This code signifies an adverse effect resulting from an accidental overdose or improper use of a medication that primarily impacts the body's involuntary functions, such as heart rate, digestion, or breathing. The patient is in a subsequent phase of care for this poisoning event, meaning they are receiving follow-up treatment after the initial acute phase.

Apply this code when a patient presents for ongoing management of symptoms or complications stemming from an unintentional poisoning by a drug affecting the autonomic nervous system. This includes scenarios like follow-up appointments for persistent arrhythmias, gastrointestinal issues, or neurological deficits after the initial emergency treatment.

• Always sequence this code after the primary diagnosis for the specific manifestation of the poisoning.
• Ensure documentation clearly specifies the accidental nature of the poisoning and that the encounter is for subsequent care.
• Verify the drug involved is known to primarily affect the autonomic nervous system.