Adverse effect of methadone, sequela

This code signifies a long-term or residual condition resulting from a previous adverse reaction to methadone. These are persistent health problems that remain after the acute effects of the methadone adverse event have resolved.

Apply this code when documenting a patient presenting with a chronic health issue directly attributable to a past adverse effect of methadone. This includes conditions like persistent organ damage or neurological deficits that developed due to the methadone reaction and are still present.

• Always sequence this code after the code for the specific sequela (e.g., chronic liver failure, persistent neuropathy).
• Ensure documentation clearly links the current condition to a past adverse effect of methadone.
• Do not use for acute adverse effects; those require an initial encounter or subsequent encounter code.