Toxic effect of hydrogen cyanide, assault, subs encntr

This code signifies a toxic reaction resulting from exposure to hydrogen cyanide, specifically when the exposure was intentionally inflicted by another person. It is used for encounters following the initial treatment, such as follow-up care, monitoring for long-term effects, or rehabilitation.

Apply this code for patients presenting for ongoing management of symptoms or complications arising from a hydrogen cyanide poisoning that was determined to be an assault. This includes situations like follow-up appointments after discharge from acute care, or when a patient is seen for persistent neurological or respiratory issues related to the initial toxic exposure.

• Always sequence this code after the primary diagnosis related to the specific manifestations of the poisoning.
• Ensure documentation clearly supports the "assault" intent and that the encounter is for subsequent care.
• Do not use for the initial treatment of the acute poisoning; a different encounter character would be required.