Underdosing of oth antipsychotics and neuroleptics, sequela

This code indicates that a patient is experiencing a long-term consequence or complication resulting from the inadequate or insufficient administration of an antipsychotic or neuroleptic medication. This underdosing occurred in the past and is no longer an active issue, but its lasting effects are currently being treated or evaluated.

Use this code when documenting a patient's current condition that is a direct, residual effect of a previous underdosing of an antipsychotic or neuroleptic. This applies when the underdosing event itself is no longer ongoing, but the patient is being managed for its sequelae, such as a relapse of psychotic symptoms, worsening of a chronic mental health condition, or other persistent adverse outcomes.

• Requires a seventh character "S" to indicate sequela, meaning the residual effect of a past underdosing.
• Always sequence this code after the code(s) for the specific condition(s) or symptom(s) that are the sequela of the underdosing.
• Do not use for active underdosing; for current underdosing, refer to the appropriate acute T-code with a different seventh character.