ICD-10-CM > S00-T88 > T36-T50 > T40 > T40.3 > T40.3X > T40.3X1 > T40.3X1A T40.3X1A Poisoning by methadone, accidental (unintentional), initial encounter Billable/Specific Copy Code Copy Description Applicable To Poisoning by methadone NOS