Toxic effect of strychnine and its salts, assault, subs

This code signifies a harmful reaction to strychnine or its derivatives that occurred as a result of an intentional act of violence or aggression. The "subsequent encounter" indicates that the patient is receiving follow-up care for the toxic effects after the initial treatment phase. This could include ongoing management of symptoms, monitoring for long-term complications, or rehabilitation.

Apply this code when documenting follow-up care for a patient who was poisoned by strychnine due to an assault. This would be appropriate for visits addressing persistent neurological symptoms, cardiac issues, or other sequelae of the poisoning after the acute phase has passed. It is used for any encounter after the initial treatment for the acute toxic effect.

• Ensure documentation clearly states the poisoning was due to an assault and that this is not the initial treatment encounter.
• Always code the specific manifestation(s) of the toxic effect (e.g., convulsions, cardiac arrhythmia) as additional diagnoses.
• Consider external cause codes (V00-Y99) to provide further detail about the circumstances of the assault, if available.