Poisn by oth drug aff the autonm nervous sys, slf-hrm, init

This code signifies an overdose or toxic effect from a medication that primarily impacts the involuntary bodily functions controlled by the autonomic nervous system, such as heart rate, digestion, or breathing. The poisoning is explicitly due to the patient deliberately harming themselves.

Apply this code when documentation clearly states a patient intentionally ingested or administered an excessive amount of a drug like a cholinergic agent, anticholinergic, or adrenergic agonist/antagonist, resulting in adverse systemic effects. This code is for the initial presentation and active treatment of the poisoning.

• Confirm the intent of self-harm is explicitly documented; otherwise, consider accidental or undetermined intent codes.
• Ensure the drug involved primarily affects the autonomic nervous system. If not, a more specific drug class code may be appropriate.
• This "A" seventh character is only for the initial encounter for active treatment of the poisoning. Subsequent care would use "D" or "S".