Poisn by antidotes and chelating agents, self-harm, sequela

This code signifies a long-term consequence or complication arising from a deliberate overdose or misuse of medications intended to counteract poisons or remove heavy metals from the body. It indicates that the patient intentionally harmed themselves using antidotes or chelating agents, and the current encounter addresses a residual effect of that poisoning event.

Apply this code when documenting a patient presenting with a chronic condition, organ damage, or other lasting health issues directly attributable to a past intentional self-poisoning with antidotes or chelating agents. This code is appropriate for follow-up care related to the sequelae, not the acute poisoning itself.

• Always sequence this "S" code as a secondary diagnosis, following the code for the specific sequela (e.g., kidney failure, liver damage).
• Ensure documentation clearly links the current condition to a past intentional self-harm event involving antidotes or chelating agents.
• Do not use this code for acute poisoning events; instead, refer to the acute poisoning codes for initial encounters.