Toxic effect of cyanides, assault, sequela

This code signifies the long-term or residual effects resulting from a cyanide poisoning that occurred due to an intentional assault. It indicates that the patient is presenting for care related to a chronic condition or complication directly attributable to a past malicious exposure to cyanide.

Apply this code when documenting follow-up care for a patient experiencing persistent health issues (e.g., neurological deficits, cardiac damage, organ dysfunction) that are a direct consequence of a previous cyanide poisoning inflicted by another person. This code is appropriate for encounters addressing the sequelae, not the initial acute poisoning event.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a past cyanide poisoning and specifies the assault as the intent.
• Do not use this code for acute poisoning or for poisonings due to accidental or suicidal intent.