Underdosing of unsp antipsychotics and neuroleptics, sequela

This code indicates a patient is experiencing a long-term consequence or complication arising from the insufficient administration or cessation of an unspecified antipsychotic or neuroleptic medication. These sequelae are the residual effects that persist after the period of underdosing has concluded.

Apply this code when documentation clearly links a current, chronic condition or symptom to a past episode of underdosing of an antipsychotic or neuroleptic, and the specific drug is not identified. This is appropriate for conditions like persistent psychotic symptoms, relapse of a mental health disorder, or other lasting adverse effects directly attributed to the inadequate medication regimen.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation explicitly states the underdosing occurred and that the current condition is a direct result (sequela) of that underdosing.
• Avoid using this code if the specific antipsychotic or neuroleptic is known; instead, use the more specific T43.506- codes.