Poisoning by MAO inhib antidepress, undetermined, sequela

This code signifies a long-term or residual effect resulting from an undetermined poisoning event involving monoamine oxidase inhibitor (MAOI) antidepressants. This means the initial acute poisoning has resolved, but the patient continues to experience lasting health problems directly attributable to the MAOI exposure, and the intent of the poisoning (accidental, intentional self-harm, assault) could not be determined.

Apply this code when documenting a patient presenting with chronic or persistent symptoms, conditions, or complications that are a direct consequence of a past MAOI antidepressant poisoning where the intent was not specified or could not be established. This would be used after the acute phase of the poisoning has passed and the patient is being treated for the ongoing sequelae.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a past MAOI poisoning of undetermined intent.
• Do not use this code for acute poisoning events; a different code from the T43.1X category would be appropriate for the initial encounter.