Toxic effect of cyanides, undetermined, initial encounter

This code signifies a patient presenting with an adverse health effect due to exposure to cyanide, where the intent of the exposure (e.g., accidental, intentional self-harm, assault) cannot be determined at the time of the initial encounter. The patient is experiencing the acute toxic effects of the substance.

Apply this code for initial evaluations of patients exhibiting signs and symptoms of cyanide poisoning, such as headache, dizziness, nausea, rapid breathing, or cardiovascular collapse, when the circumstances surrounding the exposure are unclear or unconfirmed. This is appropriate when the provider cannot definitively classify the poisoning as accidental, intentional, or assault.

• Always sequence this code first if it is the primary reason for the encounter.
• Do not use this code if the intent of the poisoning is known; instead, select the appropriate intent (e.g., accidental, intentional self-harm).
• Ensure documentation supports the "undetermined" nature of the exposure and that this is the initial presentation for treatment.