Toxic effect of hydrogen cyanide, self-harm, subs

This code signifies a medical encounter for a patient experiencing adverse health effects due to self-inflicted poisoning by hydrogen cyanide. The patient has already received initial treatment for this intentional exposure and is now presenting for follow-up care, such as monitoring for long-term complications or continued management of symptoms.

Apply this code when documenting subsequent visits for a patient who intentionally ingested or inhaled hydrogen cyanide, and is now receiving ongoing medical attention after the initial acute phase. Examples include follow-up appointments for neurological sequelae, cardiac monitoring, or mental health evaluations related to the self-harm attempt.

• Ensure documentation clearly states the intentional nature of the hydrogen cyanide exposure.
• Verify the encounter is for follow-up care, not the initial treatment of the acute poisoning.
• Always sequence this code after any codes for the specific manifestations or complications of the poisoning.