Poisoning by oth drug/meds/biol subst, self-harm, sequela

This code describes the long-term effects or complications arising from a past intentional self-poisoning event involving drugs, medications, or biological substances. It signifies that the acute phase of the poisoning has resolved, but the patient is now presenting with residual health problems directly attributable to that self-harm attempt.

Apply this code when a patient presents for treatment of a chronic condition, organ damage, or other lasting sequelae that are documented as a direct result of a previous intentional self-poisoning. This is used after the acute poisoning episode has concluded and the patient is no longer in the acute phase of intoxication or immediate recovery. Examples include chronic kidney disease from acetaminophen overdose or neurological deficits from antidepressant overdose.

• Always sequence this sequela code after the code for the specific nature of the sequela (e.g., chronic kidney failure).
• Ensure documentation clearly links the current condition to a past intentional self-poisoning event.
• Do not use this code for the initial or acute treatment of the poisoning itself; use the acute poisoning code with the appropriate seventh character for initial or subsequent encounter.