Poisoning by unsp antipsychot/neurolept, undet, sequela

This code signifies a long-term consequence or residual effect resulting from a poisoning event involving an unspecified antipsychotic or neuroleptic medication, where the intent of the poisoning (accidental, intentional self-harm, assault, or undetermined) could not be established at the time of the original event. The patient is no longer in the acute phase of the poisoning but is experiencing ongoing health issues directly attributable to it.

Use this code when documenting a patient presenting with chronic or residual symptoms (e.g., persistent neurological deficits, organ damage, or psychiatric sequelae) that are directly linked to a past poisoning by an antipsychotic or neuroleptic drug. This applies when the original poisoning's intent was not determined, and the acute phase of the poisoning has resolved. It should be assigned for follow-up care related to these lasting effects.

• Always assign this code as a secondary diagnosis, following the code for the specific sequela (e.g., chronic kidney disease, tardive dyskinesia).
• Ensure documentation clearly links the current condition to the past poisoning event and specifies the "undetermined" intent.
• Do not use this code for acute poisoning events; instead, use the appropriate acute poisoning code with the "undetermined" intent.