Poisoning by phenothiaz antipsychot/neurolept, acc, sequela

This code indicates a long-term or residual effect resulting from an accidental overdose or adverse reaction to phenothiazine antipsychotics or other neuroleptic medications. These sequelae are persistent conditions that arise after the acute phase of the poisoning has resolved. Examples include tardive dyskinesia, persistent extrapyramidal symptoms, or other chronic neurological or psychiatric complications.

Apply this code when documenting a patient presenting with a chronic condition directly attributable to a past, unintentional poisoning by phenothiazine antipsychotics or neuroleptics. This is used after the acute poisoning event has concluded and the patient is being treated for the lasting consequences. It is appropriate for follow-up visits addressing these permanent or long-standing effects.

• Always code the specific sequela (e.g., G24.0 for tardive dyskinesia) first, followed by this code to indicate the cause.
• Ensure documentation clearly links the current condition to a past accidental phenothiazine poisoning.
• Do not use this code for acute poisoning events; use the appropriate acute poisoning code for the initial encounter.