Poisoning by methadone, intentional self-harm, subs encntr

This code signifies a patient presenting for follow-up care or sequelae related to an intentional self-harm poisoning event involving methadone. It indicates that the initial acute treatment for the overdose has already occurred, and the current encounter addresses ongoing medical issues or complications.

Apply this code for patients seen in an outpatient clinic, rehabilitation setting, or for hospital readmissions specifically for complications arising from a prior methadone self-poisoning attempt. Examples include managing organ damage, psychiatric sequelae, or withdrawal symptoms during a subsequent visit.

• Always pair with an external cause code (e.g., X42.XXXA for accidental, X62.XXXA for intentional self-harm) to fully describe the event.
• Ensure the "D" seventh character is appropriate for a subsequent encounter, indicating care after the initial active treatment.
• Distinguish carefully between initial (A), subsequent (D), and sequela (S) encounters based on the patient's current stage of care.