Poisoning by methylphenidate, intentional self-harm, sequela

This code signifies a long-term complication or residual effect stemming from an intentional overdose or self-poisoning with methylphenidate. It indicates that the acute phase of the poisoning has passed, and the patient is now experiencing persistent health issues directly attributable to that event.

Apply this code when documenting a patient presenting with chronic physical or psychological sequelae (e.g., cardiac damage, neurological deficits, psychiatric disorders) that are definitively linked to a past intentional self-harm attempt involving methylphenidate. This code is appropriate for follow-up visits addressing these lasting effects, not for the initial acute poisoning episode.

• Always sequence this sequela code after the code describing the specific nature of the sequela (e.g., I42.7 for cardiomyopathy).
• Ensure documentation clearly establishes the causal link between the past methylphenidate self-harm and the current sequela.
• Do not use this code for acute poisoning events; instead, refer to the appropriate acute poisoning codes (e.g., T43.632A).