Adverse effect of mixed antiepileptics, sequela

This code indicates a long-term or permanent health problem resulting from a past adverse reaction to a combination of antiepileptic medications. These sequelae are the residual effects that persist after the acute phase of the adverse drug event has resolved.

Apply this code when documenting chronic neurological deficits, organ damage, or other lasting complications directly attributable to a prior adverse effect from mixed antiepileptic drug therapy. This is used for conditions that are no longer acute but represent a permanent consequence.

• Always sequence this code after the code for the specific sequela (e.g., chronic kidney disease, permanent cognitive impairment).
• Ensure documentation clearly links the current chronic condition to a past adverse effect of mixed antiepileptics.
• Do not use for acute adverse effects; refer to the appropriate acute adverse effect code for initial encounters.